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Chemical Structure| 134872-23-4

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Product Details of [ 134872-23-4 ]

CAS No. :134872-23-4
Formula : C6H6BrNS
M.W : 204.09
SMILES Code : CSC1=CN=C(Br)C=C1
MDL No. :MFCD04974522
InChI Key :IFMCOWPTUPYFCT-UHFFFAOYSA-N
Pubchem ID :11658494

Safety of [ 134872-23-4 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P280-P301+P312+P330-P304+P340+P312-P305+P351+P338-P337+P313

Computational Chemistry of [ 134872-23-4 ] Show Less

Physicochemical Properties

Num. heavy atoms 9
Num. arom. heavy atoms 6
Fraction Csp3 0.17
Num. rotatable bonds 1
Num. H-bond acceptors 1.0
Num. H-bond donors 0.0
Molar Refractivity 43.66
TPSA ?

Topological Polar Surface Area: Calculated from
Ertl P. et al. 2000 J. Med. Chem.

38.19 Ų

Lipophilicity

Log Po/w (iLOGP)?

iLOGP: in-house physics-based method implemented from
Daina A et al. 2014 J. Chem. Inf. Model.

2.09
Log Po/w (XLOGP3)?

XLOGP3: Atomistic and knowledge-based method calculated by
XLOGP program, version 3.2.2, courtesy of CCBG, Shanghai Institute of Organic Chemistry

2.39
Log Po/w (WLOGP)?

WLOGP: Atomistic method implemented from
Wildman SA and Crippen GM. 1999 J. Chem. Inf. Model.

2.57
Log Po/w (MLOGP)?

MLOGP: Topological method implemented from
Moriguchi I. et al. 1992 Chem. Pharm. Bull.
Moriguchi I. et al. 1994 Chem. Pharm. Bull.
Lipinski PA. et al. 2001 Adv. Drug. Deliv. Rev.

1.85
Log Po/w (SILICOS-IT)?

SILICOS-IT: Hybrid fragmental/topological method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

2.6
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

2.3

Water Solubility

Log S (ESOL):?

ESOL: Topological method implemented from
Delaney JS. 2004 J. Chem. Inf. Model.

-3.04
Solubility 0.187 mg/ml ; 0.000915 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble
Log S (Ali)?

Ali: Topological method implemented from
Ali J. et al. 2012 J. Chem. Inf. Model.

-2.83
Solubility 0.3 mg/ml ; 0.00147 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble
Log S (SILICOS-IT)?

SILICOS-IT: Fragmental method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

-3.38
Solubility 0.0851 mg/ml ; 0.000417 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble

Pharmacokinetics

GI absorption?

Gatrointestinal absorption: according to the white of the BOILED-Egg

High
BBB permeant?

BBB permeation: according to the yolk of the BOILED-Egg

Yes
P-gp substrate?

P-glycoprotein substrate: SVM model built on 1033 molecules (training set)
and tested on 415 molecules (test set)
10-fold CV: ACC=0.72 / AUC=0.77
External: ACC=0.88 / AUC=0.94

No
CYP1A2 inhibitor?

Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.83 / AUC=0.90
External: ACC=0.84 / AUC=0.91

Yes
CYP2C19 inhibitor?

Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.80 / AUC=0.86
External: ACC=0.80 / AUC=0.87

No
CYP2C9 inhibitor?

Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set)
and tested on 2075 molecules (test set)
10-fold CV: ACC=0.78 / AUC=0.85
External: ACC=0.71 / AUC=0.81

No
CYP2D6 inhibitor?

Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set)
and tested on 1068 molecules (test set)
10-fold CV: ACC=0.79 / AUC=0.85
External: ACC=0.81 / AUC=0.87

No
CYP3A4 inhibitor?

Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set)
and tested on 2579 molecules (test set)
10-fold CV: ACC=0.77 / AUC=0.85
External: ACC=0.78 / AUC=0.86

No
Log Kp (skin permeation)?

Skin permeation: QSPR model implemented from
Potts RO and Guy RH. 1992 Pharm. Res.

-5.85 cm/s

Druglikeness

Lipinski?

Lipinski (Pfizer) filter: implemented from
Lipinski CA. et al. 2001 Adv. Drug Deliv. Rev.
MW ≤ 500
MLOGP ≤ 4.15
N or O ≤ 10
NH or OH ≤ 5

0.0
Ghose?

Ghose filter: implemented from
Ghose AK. et al. 1999 J. Comb. Chem.
160 ≤ MW ≤ 480
-0.4 ≤ WLOGP ≤ 5.6
40 ≤ MR ≤ 130
20 ≤ atoms ≤ 70

None
Veber?

Veber (GSK) filter: implemented from
Veber DF. et al. 2002 J. Med. Chem.
Rotatable bonds ≤ 10
TPSA ≤ 140

0.0
Egan?

Egan (Pharmacia) filter: implemented from
Egan WJ. et al. 2000 J. Med. Chem.
WLOGP ≤ 5.88
TPSA ≤ 131.6

0.0
Muegge?

Muegge (Bayer) filter: implemented from
Muegge I. et al. 2001 J. Med. Chem.
200 ≤ MW ≤ 600
-2 ≤ XLOGP ≤ 5
TPSA ≤ 150
Num. rings ≤ 7
Num. carbon > 4
Num. heteroatoms > 1
Num. rotatable bonds ≤ 15
H-bond acc. ≤ 10
H-bond don. ≤ 5

0.0
Bioavailability Score?

Abbott Bioavailability Score: Probability of F > 10% in rat
implemented from
Martin YC. 2005 J. Med. Chem.

0.55

Medicinal Chemistry

PAINS?

Pan Assay Interference Structures: implemented from
Baell JB. & Holloway GA. 2010 J. Med. Chem.

0.0 alert
Brenk?

Structural Alert: implemented from
Brenk R. et al. 2008 ChemMedChem

1.0 alert: heavy_metal
Leadlikeness?

Leadlikeness: implemented from
Teague SJ. 1999 Angew. Chem. Int. Ed.
250 ≤ MW ≤ 350
XLOGP ≤ 3.5
Num. rotatable bonds ≤ 7

No; 1 violation:MW<1.0
Synthetic accessibility?

Synthetic accessibility score: from 1 (very easy) to 10 (very difficult)
based on 1024 fragmental contributions (FP2) modulated by size and complexity penaties,
trained on 12'782'590 molecules and tested on 40 external molecules (r2 = 0.94)

2.19

Application In Synthesis of [ 134872-23-4 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 134872-23-4 ]

[ 134872-23-4 ] Synthesis Path-Downstream   1~34

  • 1
  • [ 74-99-7 ]
  • [ 134872-23-4 ]
  • [ 472962-40-6 ]
  • 2
  • [ 624-28-2 ]
  • [ 624-92-0 ]
  • [ 134872-23-4 ]
YieldReaction ConditionsOperation in experiment
94% With hydrogenchloride; n-butyllithium; In hexane; 5-Methylthio-2-bromopyridine. (step 1) To a solution of 2,5-dibromopyridine (23.4 g, 0.099 mol) in ether (500 mL), n-butyl lithium (1.52 M in n-hexane, 68 mL, 0.10 mmol) was added dropwise at -78 C. and the mixture was stirred for 1 hour at the temperature. Dimethyldisulfide (9.8 mL, 0.11 mol) was added slowly at -78 C. and the mixture was stirred for 1 hour at that temperature and further 1 hour at 0 C. The mixture was quenched with aqueous 1 N hydrochloric acid (200 mL) and extracted with ether (100 mL*2), dried over magnesium sulfate (MgSO4), and concentrated in vacuo gave the title compound (18.9 g, 94%). 1H-NMR (CDCl3) δ: 8.24 (dd, J=0.8, 2.5 Hz, 1H), 7.43 (dd, J =2.8, 8.4 Hz, 1H), 7.38 (dd, J =0.8, 8.4 Hz, 1H), 2.50 (s, 3H).
94% With hydrogenchloride; n-butyllithium; In hexane; 5-Methylthio-2-bromopyridine. (step 1) To a solution of 2,5-dibromopyridine (23.4 g, 0.099 mol) in ether (500 mL), n-BuLi (1.52 M in n-hexane, 68 mL, 0.10 mmol) was added dropwise at -78 C. and the mixture was stirred for 1 hour at the temperature. Dimethyldisulfide (9.8 mL, 0.11 mol) was added slowly at -78 C. and the mixture was stirred for 1 hour at that temperature and further 1 hour at 0 C. The mixture was quenched with aqueous 1N HCl (200 mL) and extracted with ether (100 mL*2), dried over magnesium sulfate (MgSO4), and concentrated in vacuo gave the title compound (18.9 g, 94%). 1H-NMR (CDCl3) δ: 8.24 (dd, J=0.8, 2.5 Hz, 1H), 7.43 (dd, J=2.8, 8.4 Hz, 1H), 7.38 (dd, J=0.8, 8.4 Hz, 1H), 2.50 (s, 3H).
94% With hydrogenchloride; n-butyllithium; In hexane; STEP 1 5-Methylthio-2-bromopyridine To a solution of 2,5-dibromopyridine (23.4 g, 0.099 mol) in ether (500 mL), was added dropwise n-butyl lithium (n-BuLi) (1.52 M in n-hexane, 68 mL, 0.10 mmol) at -78 C. and the mixture was stirred for 1 hour at the temperature. Dimethyldisulfide (9.8 mL, 0.11 mol) was added slowly at -78 C. and the mixture was stirred for 1 hour at that temperature and further 1 hour at 0 C. The mixture was quenched with aqueous 1N hydrochloric acid (200 mL) and extracted with ether (100 mL*2), dried over MgSO4, and concentrated in vacuo to yield the title compound (18.9 g, 94%). 1H-NMR (CDCl3) δ: 8.24 (dd, J=0.8, 2.5 Hz, 1H), 7.43 (dd, J=2.8, 8.4 Hz, 1H), 7.38 (dd, J=0.8, 8.4 Hz, 1H), 2.50 (s, 3H).
66.7% Step 1: Synthesis of 2-bromo-5-(methylthio)pyridine To a stirred solution of 2,5-dibromopyridine (0.4 g, 1.688 mmol) in diethyl ether (15 mL) at -78 C. was added n-Butyl lithium (2.5M in hexane) (0.8 mL, 2.026 mmol) under nitrogen and stirred for 1 h at same temperature. Solution of DMDS (1.3 mL, 16.463 mmol) in diethyl ether was then added drop wise to the reaction mixture, stirred for 1 h at -78 C. and for 1 h at RT. Progress of reaction was monitored by TLC. After reaction completion reaction mass was quenched with 1N HCl and extracted with diethyl ether. The organic layer was washed with brine, dried over sodium sulphate and concentrated under reduced pressure. Crude was purified by silica gel (100-200 mesh) column chromatography using 2% ethyl acetate in hexane as eluent to obtain 2-bromo-5-(methylthio)pyridine (0.23 g, 66.7%) as yellow oil. MS: 205.0 [M++1]
Example 1 : This example illustrates the preparation of 3-chloro-4-(3,5-dichloro-pyridin-2-yl)- 6-methyl-5-(5-methylsulfanyl-pyridin-2-yl)-pyridazine (Compound No. I. u.008); a) Preparation of 2-bromo-5-methylsulfanyl-pyridine; n-Butyllithium (1.6 M in hexane, 32 ml) is added dropwise to the solution of 2,5-dibromo- pyridine (10 g) in 100 ml of diethyl ether at -75 C under a nitrogen atmosphere. After stirring for 1 h at -75 0C, dimethyl disulfide (5 g) is added and stirring is continued for 1 h. Subsequently 50 ml of 1 N hydrochloric acid are added at - 20 0C, the reaction mixture is poured into water and extracted with ethyl acetate. The combined organic layer is washed with brine, dried over sodium sulfate and evaporated under reduced pressure. 2-bromo-5- methylsulfanyl-pyridine is obtained as a brown solid, which is used in the next step without further purification.
Preparation Example 8: Synthesis of 2-bromo-5-methylsulfanyl-pyr idineUnder a nitrogen atmosphere, in a 500ml flask, 12g of 2,5-dibromo- pyridine and 250ml of ether were placed. At -78C 34ml of n-butyl lithium (1.52M in n-hexane) was added thereto, and after 1 hour, 4.9ml of dimethyldisulf ide was dropped. After 12-hours of stirring at room temperature, distilled water was slowly dropped at 0C and the resultant mixture was extracted with 200ml of ethyl acetate. The extract was washed with 200ml of 1N-HC1, and the organic layer was dried with anhydrous magnesium sulfate, and vacuum-dried, so as to provide a target compound.<173> ¾ NMR (400MHz, CDC13): 8.25C1H, s), 7.38-7.44(2H, m), 2.5K3H, s).
86.8 mg A solution of 2,5-dibromopyridine (1 g, 4.22 mmol, 1 eq) in THF (20 mL) was cooled to -78 C under N2. Then, n-BuLi (2.5 M, 1.77 mL, 4.43 mmol, 1.05 eq) was added dropwise at -78 C. The reaction mixture was stirred for 20 minutes, followed by the slow addition of 1,2-dimethyldisulfane (0.411 mL, 4.64 mmol, 1.1 eq). The reaction mixture was stirred for another 1 hour before quenched by saturated NH4CI. The reaction mixture was extracted with EA (100 mL) and water (100 mL), and then washed with brine. The organic phase was dried over anhydrous NasSCL. The mixture was filtered and concentrated under reduced pressure. The crude residue was purified by flash chromatography on silica gel (PE: EA = 10: 1) to give 416 (86.8 mg): ESI [M+H]+ = 204.1 NMR (400 MHz, CDCb) d 8.25 (t, J = 6.2 Hz, 1H), 7.41 (ddd, = 8.9, 8.3, 1.6 Hz, 2H), 2.58 - 2.40 (m, 3H).
86.8 mg A solution of 2,5-dibromopyridine (1 g, 4.22 mmol, 1 eq) in THF (20 mL) was cooled to -78 C under N2. Then, n-BuLi (2.5 M, 1.77 mL, 4.43 mmol, 1.05 eq) was added dropwise at -78 C. The reaction mixture was stirred for 20 minutes, followed by the slow addition of 1,2- dimethyldisulfane (0.411 mL, 4.64 mmol, 1.1 eq). The reaction mixture was stirred for another 1 hour before quenched by saturated MLCl. The reaction mixture was extracted with EA (100 mL) and water (100 mL), and then washed with brine. The organic phase was dried over anhydrous NasSCL. The mixture was filtered and concentrated under reduced pressure. The crude residue was purified by flash chromatography on silica gel (PE: EA = 10: 1) to give 416 (86.8 mg): ESI [M+H]+ = 204.1 NMR (400 MHz, CDCh) d 8.25 (t, J = 6.2 Hz, 1H), 7.41 (ddd, J = 8.9, 8.3, 1.6 Hz, 2H), 2.58 - 2.40 (m, 3H)
Under nitrogen protection, to a solution of 2,5-dibromopyridine (8.34 g ,35.2 mmol) in anhydrous Et20 (200 mL) at -78 C was added n-BuLi (23.2 mL, 37 mmol) drop wise over 20 min. After the resulting mixture was stirred at -78 C for 1 hr, dimethyl disulfide (3.65 g, 38.7 mmol) was added dropwise to the reaction over 10 min. The reaction was continued to stir at -78 C for additional 1 hr. After the reaction was completed as indicated by TLC analysis, the reaction was warmed to 0 C and quenched with a diluted HC1 solution (40 mL, IN) and extracted with MTBE (100 mL x 2). The combined organic phase was washed with water (20 mL), dried and concentrated to afford 6.035 g of the crude product, which was used for the next step without further purification. LC-MS (ESI+): m/z 204, 206 (M+H)+.

  • 3
  • [ 134872-23-4 ]
  • [ 343262-51-1 ]
YieldReaction ConditionsOperation in experiment
96% With sodium sulfate; 3-chloro-benzenecarboperoxoic acid; In dichloromethane; 5-Methylsulfonyl-2-bromopyridine. (step 2) To a solution of 5-methylthio-2-bromopyridine from step 1 (18.9 g, 0.093 mol) in methylene chloride (600 mL), m-chloroperbenzoic acid (48 g, 0.19 mol) was added portionwise at 0 C. and the mixture was stirred for 2 hours at room temperature. Aqueous saturated Na2SO3 (200 mL) was added and stirred for 15 minutes and organic phase was separated and washed with aqueous saturated sodium bicarbonate (NaHCO3) (200 mL), dried over magnesium sulfate (MgSO4), and concentrated in vacuo gave the title compound (20.9 g, 96%). 1H-NMR (CDCl3) δ: 8.91 (d, J=2.6 Hz, 1H), 8.06 (dd, J =2.6, 8.4 Hz, 1H), 7.73 (d, J=8.4 Hz, 1H), 3.12 (s, 3H).
96% With sodium sulfate; 3-chloro-benzenecarboperoxoic acid; In dichloromethane; 5-Methylsulfonyl-2-bromopyridine. (step 2) To a solution of 5-methylthio-2-bromopyridine from step 1 (18.9 g, 0.093 mol) in methylene chloride (600 mL), m-chloroperbenzoic acid (48 g, 0.19 mol) was added portionwise at 0 C. and the mixture was stirred for 2 hours at room temperature. Aqueous saturated Na2SO3 (200 mL) was added and stirred for 15 minutes and organic phase was separated and washed with aqueous saturated sodium bicarbonate (NaHCO3) (200 mL), dried over magnesium sulfate (MgSO4), and concentrated in vacuo gave the title compound (20.9 g, 96%). 1H-NMR (CDCl3) δ: 8.91 (d, J=2.6 Hz, 1H), 8.06 (dd, J=2.6, 8.4 Hz, 1H), 7.73 (d, J=8.4 Hz, 1H), 3.12 (s, 3H).
71% With 3-chloro-benzenecarboperoxoic acid; In dichloromethane; at 0 - 20℃; for 2h; Intermediate 21; 2-Bromo-5-mcthancsulfonylpyridinc; To a solution of <strong>[134872-23-4]2-bromo-5-methylsulfanylpyridine</strong> (1.53g, 7.6 mmol) in DCM (2OmL) at 0 0C was added wCPBA (3.95g, 15.95 mmol) portionwise. The mixture was allowed to warm to rt and stir for 2h. DCM (30ml) was added and the organics washed with saturated Na2SO3 solution, saturated Na2CO3 solution, dried (MgSO4) and the solvent removed in vacuo. The crude product was triturated with Et2O, filtered and dried in vacuo to afford the title compound (1.25g, 71%): δϖ (CDCl3) 3.15 (3H, s), 7.75 (IH, d), 8.08 (IH, dd), 8.95 (IH, d).
With Oxone; In tetrahydrofuran; water; at 0 - 20℃; for 3h;Inert atmosphere; 174> Preparation Example 9:Synthesis of 2-bromo-5-methanesulfonyl -pyridine<i76> Under a nitrogen atmosphere, in a 500ml flask, 5g of 5-methylthio~2- bromopyr idine was added in THF 200mL/dist i 1 led water 40mL, and stirred. At 0 C 40g of oxone was added thereto, followed by stirring at room temperature for 3 hours. Then, the reaction mixture was filtered, and the filtrate was extracted with 200ml of distilled water and 200ml of ethyl acetate. The organic layer was dried with anhydrous magnesium sulfate, and vacuum-dried so as to provide a target compound.<i77> ¾ NMR (400MHz, CDC13): 8.93(1H, s), 8.06-8.09UH, d), 7.73-7.75UH, d) ,3.14C3H, s).

  • 4
  • [ 18794-33-7 ]
  • [ 884863-17-6 ]
  • [ 134872-23-4 ]
  • 5
  • [ 956137-23-8 ]
  • [ 134872-23-4 ]
  • (4-{4-[5-(5-methylsulfanyl-pyridin-2-ylamino)-pyridin-2-yl]-phenyl}-cyclohexyl)-acetic acid methyl ester [ No CAS ]
YieldReaction ConditionsOperation in experiment
With caesium carbonate;tris-(dibenzylideneacetone)dipalladium(0); 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene; In 1,4-dioxane; at 80℃; for 18h;Sealed vessel; 2-Bromo-5-methylsulfanyl-pyridiϖe (51 mg, 0.25 mmol) and {4-[4-(5-Amino-pyridin-2-yl)- phenyl]-cyclohexyl}-acetic acid methyl ester (75 mg, 0.25 mmol) were dissolved in 1 ,4- dioxane (2 mL) in a pressure vessel. Pd2dba3 (7 mg, 0.008 mmol) and XANTPHOS (6 mg, 0.01 mmol) were added, followed by cesium carbonate (163 mg, 0.50 mmol). The mixture was sparged with nitrogen for 10 minutes, then the vessel was sealed and heated at 800C for 18 hours. The mixture was partitioned between EtOAc and water, then the organic layer was washed with brine, dried with magnesium sulfate, filtered, and concentrated via rotary evaporation. The crude material was used in the next step without further purification; MS (M+H)+ 448.3.
  • 6
  • [ 134872-23-4 ]
  • [ 343629-25-4 ]
  • 7
  • [ 134872-23-4 ]
  • 2-Hydrazino-5-(methylsulfonyl)pyridine hydrochloride [ No CAS ]
  • 9
  • [ 134872-23-4 ]
  • [ 472962-18-8 ]
  • 10
  • [ 134872-23-4 ]
  • (1S,3S,7S,10R,11S,12S,16R)-7,11-Dihydroxy-8,8,10,12,16-pentamethyl-3-[(E)-1-methyl-2-(5-methylsulfanyl-pyridin-2-yl)-vinyl]-4-oxa-bicyclo[14.1.0]heptadecane-5,9-dione [ No CAS ]
  • 11
  • [ 134872-23-4 ]
  • [ 472962-30-4 ]
  • 12
  • [ 134872-23-4 ]
  • (1S,3R,7S,10R,11S,12S,16R)-7,11-Bis-(tert-butyl-dimethyl-silanyloxy)-8,8,10,12,16-pentamethyl-3-[(E)-1-methyl-2-(5-methylsulfanyl-pyridin-2-yl)-vinyl]-4-oxa-bicyclo[14.1.0]heptadecane-5,9-dione [ No CAS ]
  • 13
  • [ 134872-23-4 ]
  • [ 472962-23-5 ]
  • 14
  • [ 134872-23-4 ]
  • (3S,6R,7S,8S)-3,7-Bis-(tert-butyl-dimethyl-silanyloxy)-11-{(1R,2S)-2-[(E)-2-hydroxy-3-methyl-4-(5-methylsulfanyl-pyridin-2-yl)-but-3-enyl]-1-methyl-cyclopropyl}-4,4,6,8-tetramethyl-5-oxo-undecanoic acid 2-trimethylsilanyl-ethyl ester [ No CAS ]
  • 15
  • (1-etoxvinyl) tributyl tin [ No CAS ]
  • [ 134872-23-4 ]
  • [ 667882-37-3 ]
YieldReaction ConditionsOperation in experiment
[1-(5-METHVLSULFANYI-PVRIDIN-2-YL)-ETHANONE] To a stirring solution of 2-bromo 5-methylsulfanyl pyridine (3.05g 14. [9MMOL),] triethylamine (2. [10ML,] 14. 9mmol) and [(1-ETHOXYVINYL)] tributyl tin (10. 1mL, 29. 8mmol) in anhydrous 1,4-dioxane [(100ML),] was added dichlorobis (triphenylphosphine) palladium (II) (5mol%, 0.524g) and the reaction heated to reflux under nitrogen for 18 hours. After cooling, dichlorobis [(TRIPHENYLPHOSPHINE) PALLADIUM (II)] was added and the reaction heated under nitrogen for a further 18 hours. The reaction was allowed to cool and-the reaction mixture partitioned between saturated aqueous potassium fluoride solution (250mL) and diethyl ether (250mL). The ether layer was separated and 2N hydrochloric acid (250mL) added. The acid layer was separated and sodium carbonate added portionwise until the solution reached pH 8. The solution was extracted with [DICHLOROMETHANE] (3 x 200mL). The organic extracts were combined and the solvent removed. The residue was partitioned between cyclohexane (60ml) and acetonitrile (60mL). The acetonitrile layer was separated and the solvent removed to yield a brown solid. The crude product was purified by flash column chromatography (cyclohexane : ethyl acetate, 95: 5) to afford the title compound as a white solid : [1H] NMR [(CDCB)-ã2.] 56 (s, 3H), 2.69 (s, 3H), 7.60 (dd, 1 H), 7.96 (d, 1 H), 8.49 (d, 1H).
  • 16
  • sodium sulfate (Na2SO3) [ No CAS ]
  • [ 134872-23-4 ]
  • [ 343262-51-1 ]
YieldReaction ConditionsOperation in experiment
96% With 3-chloro-benzenecarboperoxoic acid; In dichloromethane; STEP 2 5-Methylsulfonyl-2-bromopyridine To a solution of 5-methylthio-2-bromopyridine from step 1 (18.9 g, 0.093 mol) in methylene chloride (600 mL), was added portionwise m-chloroperbenzoic acid (48 g, 0.19 mol) at 0 C. and the mixture was stirred for 2 hours at room temperature. Aqueous saturated sodium sulfate (Na2SO3) (200 mL) was added and stirred for 15 minutes and organic phase was separated and washed with aqueous saturated sodium bicarbonate (NaHCO3) (200 mL), dried over MgSO4, and concentrated in vacuo gave the title compound (20.9g, 96%). 1H-NMR (CDCl3) δ: 8.91 (d, J=2.6 Hz, 1H), 8.06 (dd, J=2.6, 8.4 Hz, 1H), 7.73 (d, J=8.4 Hz, 1H), 3.12 (s, 3H).
  • 17
  • [ 624-28-2 ]
  • [ 29786-93-4 ]
  • [ 624-92-0 ]
  • [ 134872-23-4 ]
YieldReaction ConditionsOperation in experiment
2-Bromo [5-METHYLSULFANYL] pyridine A stirring suspension of 2, 5-dibromopyridine [(10G,] 0. [042MOL)] in anhydrous diethyl ether (240mL) was cooled to-78C under nitrogen before the dropwise addition of n-butyl lithium (1.6M in hexanes, 0. [044MOL,] 27.5mL). The reaction was stirred at-78C for 4 hours before the dropwise addition of methyl disulphide (0. [044MOL,] 3.91 mL). The reaction was allowed to warm to [22C] and stirred for a further 18 hours. The reaction was quenched with water [(100ML)] and the aqueous and organic layers partitioned. The aqueous layer was extracted with diethyl ether (x3). The extracts were combined with the organic layer, washed with brine, dried [(MGS04)] and the solvent removed. The crude product was purified by crystallisation from diethyl ether [AT-20C] to afford the title compound as a white solid [: H] NMR [(CDC . A)-52.] 50 (s, 3H), 7.38 (dd, 1 H), 7.42 (dd, 1H), 8.23 (d, [1H).]
  • 18
  • [ 107-12-0 ]
  • [ 134872-23-4 ]
  • [ 1002760-15-7 ]
YieldReaction ConditionsOperation in experiment
b) Preparation of 1-(5-methylsulfanyl-pyridin-2-yl)-propan-1-one; n-Butyllithium (1.6 M in hexane, 30 ml) is added dropwise to the solution of 2-bromo-5- methylsulfanyl-pyridine (8.1 g) in 370 ml of toluene at -75 0C under a nitrogen atmosphere. After stirring for 2 h at -75 0C, propionitrile (2.8 g) is added and stirring is continued for 1 h. Subsequently, 60 ml of 1 N hydrochloric acid are slowly added at -10 0C and the reaction <n="18"/>mixture is neutralised with 2 N NaOH. The reaction mixture is poured into water, extracted with ethyl acetate, washed with brine, dried over sodium sulfate and evaporated under reduced pressure. The remainder is purified on silica gel, using a mixture of heptane / ethyl acetate 9 : 1 as eluent to obtain 1-(5-methylsulfanyl-pyridin-2-yl)propan-1-one as a yellow solid (m.p. 52 - 53 0C).
  • 19
  • C21H20Cl2N2 [ No CAS ]
  • [ 134872-23-4 ]
  • C27H25Cl2N3S [ No CAS ]
  • 20
  • [ 95-92-1 ]
  • [ 134872-23-4 ]
  • [ 1080061-07-9 ]
YieldReaction ConditionsOperation in experiment
43% Reference Example 144 ethyl [5-(methylsulfanyl)pyridin-2-yl](oxo)acetate A solution of n-butyllithium (1.6M hexane solution, 10.6 mL) in toluene (10 mL) was cooled to -45C and purged with nitrogen. n-Butylmagnesium chloride (2.0M tetrahydrofuran solution, 4.22 mL) was added dropwise to the reaction mixture, and the mixture was stirred at 0C for 30 min. To the reaction mixture was added dropwise a solution of 2-bromo-5-(methylsulfanyl)pyridine (4.30 g) in toluene (40 mL), and the mixture was stirred at -20C for 2.5 hr. To the reaction mixture was added diethyl oxalate (4.29 mL), and the mixture was stirred at room temperature for 24 hr. A saturated aqueous ammonium chloride solution was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography, and the title compound (2.05 g, yield 43%) was obtained as a yellow amorphous solid from a fraction eluted with ethyl acetate-hexane (1:2, volume ratio). 1H NMR (300 MHz, CDCl3) δ1.41 (3 H, t, J=7.2 Hz), 2.58 (3 H, s), 4.47 (2 H, q, J=7.2 Hz), 7.64 (1 H, dd, J=2.4, 8.3 Hz), 7.97 - 8.03 (1 H, m), 8.54 (1 H, d, J=2.3 Hz).
  • 21
  • [ 64-17-5 ]
  • [ 201230-82-2 ]
  • [ 134872-23-4 ]
  • [ 128073-11-0 ]
YieldReaction ConditionsOperation in experiment
91% With 1,3-bis-(diphenylphosphino)propane; triethylamine;palladium diacetate; In N,N-dimethyl-formamide; at 70℃; for 4h; A mixture of 2-bromo-5- (methylthio) pyridine (5.41 g) , palladium (II) acetate (0.60 g) , 1,3- bis (diphenylphosphino) propane (1.37 g) , triethylamine (18.5 mL) , ethanol (30 mL) and N, N-dimethylformamide (30 mL) was stirred for 4 hrs at 700C under carbon monooxide atmosphere. The reaction mixture was concentrated, water was added, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate: hexane = 1:1) to give the title compound (4.73 g, yield 91%) as yellow crystals. Melting point 44-46C.
  • 22
  • [ 134872-23-4 ]
  • [ 1093967-05-5 ]
  • 23
  • [ 134872-23-4 ]
  • [ 1093967-06-6 ]
  • 24
  • [ 134872-23-4 ]
  • [ 1439378-81-0 ]
  • 25
  • 2-methyl-2-nitrosopropane dimer [ No CAS ]
  • [ 134872-23-4 ]
  • [ 1439378-73-0 ]
  • 26
  • [ 5334-35-0 ]
  • [ 134872-23-4 ]
  • 1-methyl-6-(5-methylsulfonyl-2-pyridyl)-5H-pyrazolo[3,4-d]pyrimidin-4-one [ No CAS ]
YieldReaction ConditionsOperation in experiment
Example 111 1- methyl-6-(5-methylsulfonyl-2-pyridyl)-5H-pyrazolo[3 4-d]pyrimidin-4-one 2- Bromo-5-(methylthio)-pyridine (CASRN 134872-23-4) is converted to an organozinc compound (n-BuLi, ZnCl2) and condensed with Intermediate A (Pd2(dpa)3/dppf) and the resulted adducted oxidized to the corresponding sulfone (MCPBA) to afford the title compound: H NMR (400 MHz, DMSO-i δ ppm 11.95 (s, 1H), 9.22 (d, J = 1.6 Hz, 1H), 8.67 (d, J = 8.0 Hz, 1H), 8.58 (dd, J = 8.4 Hz, J = 2.4Hz, 1H), 8.16 (s, 1H), 4.03 (s, 3H), 3.44 (s, 3H).
  • 27
  • [ 134872-23-4 ]
  • 2-bromo-5-(S-methylsulfinyl)pyridine [ No CAS ]
YieldReaction ConditionsOperation in experiment
With sodium periodate; acetic acid; In water; at 20℃; for 2h; Step 1: 2-Bromo-S-methylsulfinyl-pyridine A mixture of 2-bromo-S-methylsulfanyl-pyridine (8.67 g), sodium periodate (12.72 g), concentrated acetic acid (115 mL), and water (30 μL) is stirred at room temperature for 2 h. The reaction mixture is diluted with water and extracted with ethyl acetate. The combined extracts are washed with sodium thiosulfate (10% aqueous solution), potassium carbonate (10% aqueous solution), and brine, dried over MgSO4 and concentrated in vacuo. The crude product is used for the next reaction step without further purification. LC (method 3): tR=0.57 min; Mass spectrum (ESI+): m/z=220 [M+H]+.
With sodium periodate; acetic acid; In water; at 20℃; for 2h; A mixture of 2-bromo-5-methylsulfanyl-pyridine (8.67 g), sodium periodate (12.72 g), concentrated acetic acid (1 15 mL), and water (30 μΙ_) is stirred at room temperature for 2 h. The reaction mixture is diluted with water and extracted with ethyl acetate. The combined extracts are washed with sodium thiosulfate (10 % aqueous solution), potassium carbonate (10 % aqueous solution), and brine, dried over MgS04 and concentrated in vacuo. The crude product is used for the next reaction step without further purification. LC (method 3): tR = 0.57 min; Mass spectrum (ESI): m/z = 220 [M+H]+
  • 28
  • [ 134872-23-4 ]
  • 2-(4-bromophenyl)-5-(S-methylsulfinyl)pyridine [ No CAS ]
  • 29
  • [ 134872-23-4 ]
  • 2-(4-bromophenyl)-5-(N-(2,2,2-trifluoroacetyl)-S-methylsulfonimidoyl)pyridine [ No CAS ]
  • 30
  • [ 134872-23-4 ]
  • 2-(4-bromophenyl)-5-(S-methylsulfonimidoyl)pyridine [ No CAS ]
  • 31
  • [ 134872-23-4 ]
  • 2-(1-(1-(3-isopropyl-1,2,4-oxadiazol-5-yl)piperidin-4-yl)ethoxy)-5-(5-(methylthio)pyridin-2-yl)thiazolo[5,4-b]pyridine [ No CAS ]
  • 32
  • [ 134872-23-4 ]
  • 2-(1-(1-(3-isopropyl-1,2,4-oxadiazol-5-yl)piperidin-4-yl)ethoxy)-5-(5-(methylsulfonyl)pyridin-2-yl)thiazolo[5,4-b]pyridine [ No CAS ]
  • 33
  • [ 1461-22-9 ]
  • [ 134872-23-4 ]
  • 2-(tributylstannyl)-5-(methylthio)pyridine [ No CAS ]
YieldReaction ConditionsOperation in experiment
55.67% Step 2: Synthesis of 2-(tributylstannyl)-5-(methylthio)pyridine To a stirred solution of 2-bromo-5-(methylthio)pyridine (0.23 g, 1.127 mmol) in diethyl ether (15 mL) at -78 C. was added n-Butyl lithium (2.5M in hexane) (0.67 mL, 1.691 mmol) under nitrogen and stirred for 1 h at same temperature. Tributylchlorostannane (0.55 g, 1.691 mmol) was then added drop wise to the reaction mixture, stirred for 1 h at -78 C. and for 2 h at RT. Progress of reaction was monitored by TLC. After reaction completion reaction mass was quenched with water and extracted with diethyl ether. The organic layer was washed with brine, dried over sodium sulphate and concentrated under reduced pressure to obtain 2-(tributylstannyl)-5-(methylthio)pyridine (0.26 g, 55.67%) as yellow oil. MS: 415.2 [M++1]
  • 34
  • C14H17N5O [ No CAS ]
  • [ 134872-23-4 ]
  • 2-(6-(((1S,3S)-3-((5-(methylthio)pyridin-2-yl)amino)cyclopentyl)amino)pyridin-3-yl)pyridazin-3(2H)-one [ No CAS ]
YieldReaction ConditionsOperation in experiment
With [(2-di-tert-butylphosphino-2′,4′,6′-triisopropyl-1, 1′-biphenyl)-2-(2′-amino-1,1′-biphenyl)] palladium(II) methanesulfonate; potassium tert-butylate; In 1,4-dioxane; at 110℃;Inert atmosphere; General procedure: The mixture of 400A (53 mg, 0.22 mmol, 1.0 eq), 131C (50 mg, 0.22 mmol. 1.0 eq), tBuXphos Pd G3 (18 mg, 0.022 mmol, 0.1 eq) and tBuOK (49 mg, 0.44 mmol, 0.2 eq) in dioxane (5 mL) was stirred at 110 C under N2 atmosphere overnight. The mixture was cooled to room temperature and filtered. The filtrate was concentrated and purified by Prep-TLC and then Prep-HPLC to afford compound 400 (50 mg, 53%, TFA salt) as an off-white solid.
 

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Technical Information

Categories

Related Functional Groups of
[ 134872-23-4 ]

Bromides

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Related Parent Nucleus of
[ 134872-23-4 ]

Pyridines

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