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Structure of 51907-18-7

Chemical Structure| 51907-18-7

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Product Details of [ 51907-18-7 ]

CAS No. :51907-18-7
Formula : C8H7NO
M.W : 133.15
SMILES Code : O=C1CCC2=C1C=NC=C2
MDL No. :MFCD08694510
InChI Key :SMHRJUIZCMDUFN-UHFFFAOYSA-N
Pubchem ID :15148823

Safety of [ 51907-18-7 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Computational Chemistry of [ 51907-18-7 ] Show Less

Physicochemical Properties

Num. heavy atoms 10
Num. arom. heavy atoms 6
Fraction Csp3 0.25
Num. rotatable bonds 0
Num. H-bond acceptors 2.0
Num. H-bond donors 0.0
Molar Refractivity 37.28
TPSA ?

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

29.96 Ų

Lipophilicity

Log Po/w (iLOGP)?

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

1.3
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

0.6
Log Po/w (WLOGP)?

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

1.21
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.

0.46
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

2.3
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

1.17

Water Solubility

Log S (ESOL):?

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

-1.49
Solubility 4.33 mg/ml ; 0.0325 mol/l
Class?

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

Very soluble
Log S (Ali)?

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

-0.8
Solubility 21.0 mg/ml ; 0.157 mol/l
Class?

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

Very 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

-2.71
Solubility 0.26 mg/ml ; 0.00195 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

No
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.

-6.69 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

1.0
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

0.0 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)

1.56

Application In Synthesis of [ 51907-18-7 ]

* 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 [ 51907-18-7 ]

[ 51907-18-7 ] Synthesis Path-Downstream   1~17

  • 2
  • [ 51907-18-7 ]
  • [ 2537-48-6 ]
  • [ 1037841-07-8 ]
YieldReaction ConditionsOperation in experiment
Reference Example 31; 6,7-dihydro-5H-cyclopenta[c]pyridin-7-ylacetonitrile [Show Image]; To a solution of diethyl cyanomethylphosphonate (346 mg, 1.95 mmol) in tetrahydrofuran (10 mL) was added 60percent sodium hydride (54.0 mg, 1.35 mmol) under ice-cooling, and the mixture was stirred at room temperature for 30 min. The mixture was added to a solution of <strong>[51907-18-7]5,6-dihydro-7H-cyclopenta[c]pyridin-7-one</strong> (130 mg, 0.976 mmol) in tetrahydrofuran (5 mL) under ice-cooling, and the mixture was stirred for 15 min. The reaction solution was diluted with saturated aqueous sodium hydrogen carbonate solution, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane=50/50-->80/20). To a solution of the purified product in methanol (10 mL) was added palladium-carbon powder (30 mg), and the mixture was stirred under a hydrogen atmosphere at room temperature for 4 hr. The catalyst was filtered off, and the filtrate was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane=40/60-->70/30) to give the title compound (95.0 mg, yield 62percent). 1H-NMR (CDCl3) delta: 1.87 - 2.03 (1H, m), 2.42 - 3.14 (5H, m), 3.53 - 3.66 (1H, m), 7.22 (1H, dd, J = 4.9, 0.8 Hz), 8.46 (1H, d, J = 4.9 Hz), 8.55 (1H, s).
  • 3
  • 4-<2-(ethoxycarbonyl)ethyl>nicotinic acid methyl ester [ No CAS ]
  • [ 51907-18-7 ]
YieldReaction ConditionsOperation in experiment
58% Reference Example 29; 5,6-dihydro-7H-cyclopenta[c]pyridin-7-one [Show Image]; A solution of methyl 4-(3-ethoxy-3-oxopropyl)nicotinate (4.80 g, 20.2 mmol) in tetrahydrofuran (100 mL) was added to a suspension of 60percent sodium hydride (3.73 g, 93.3 mmol) in tetrahydrofuran (50 mL) at room temperature. Methanol (100 muL) was added to the mixture at room temperature, and the mixture was heated under reflux for 4 hr. After cooling to room temperature, the mixture was concentrated under reduced pressure. The residue was added to 12M hydrochloric acid (50 mL) at 0°C, and the mixture was stirred at 110°C for 30 min. The mixture was alkalified with sodium hydrogen carbonate, the insoluble material was filtered off, and the filtrate was extracted with ethyl acetate. The extract was dried over anhydrous sodium sulfate, and the solvent was evaporated under reduced pressure. The residue was washed with hexane to give the title compound (1.57 g, yield 58percent). 1H-NMR (CDCl3) delta: 2.66 - 2.76 (2H, m), 3.14 - 3.23 (2H, m), 7.42 - 7.50 (1H, m), 8.71 (1H, d, J = 5.2 Hz), 9.00 (1H, d, J = 0.8 Hz).
To a solution of methyl 4-(3-ethoxy-3-oxopropyl)nicotinate (200 mg, 0.84 mmol) in THF (20 mL) was added sodium hydride (0.08 g, 3.36 mmol).The reaction mixture was heated to 60 °C under N2 and stirred at that temperature for 3 h. The organics were concentrated in vacuo.12 M HCl (4mL) was added to the above mixture at 0 oC. The reaction was stirred at that temperature for 10 min. And then the mixture was heated to 100 °C and stirred at that temperature for 30 min. Saturated aqueous NaHCO3 (75 mL) was added to the reaction vessel and adjusted pH = 8. The mixture was extracted with (3 x 50 mL). The combined organics were dried over anhydrous Na2SO4, filtered and concentrated in vacuo. The product was used for next step without further purification.
  • 4
  • [ 51907-18-7 ]
  • [ 42498-38-4 ]
  • N-tert-butyl-4-(7-hydroxy-6,7-dihydro-5H-[2]pyrindin-7-yl)benzamide [ No CAS ]
YieldReaction ConditionsOperation in experiment
c) N-tert-Butyl-4-(7-hvdroxv.6,7-dihydro-5H-[21vyridin-7-yl)benzamide; 5.3 ml of n-butyllithium (1.6M in hexane) are added dropwise to a solution of 4.250 mmol of 4-bromo-N-tert-butylbenzamide in 70 ml of tetrahydrofuran at -78°C. After 30 minutes, a solution of 3.270 mmol of 5,6-dihydro-[2]pyridin-7-one [51907-18-7] in 10 ml of tetrahydrofuran is added dropwise. The reaction mixture is stirred at-78°C for 1 hour and at room temperature for 2 hours and then quenched with saturated aqueous ammonium chloride solution. The organic phase is separated off and the aqueous phase is extracted with ethyl acetate (2x). The combined organic phases are dried with sodium sulphate and evaporated. The title compound is obtained as a white foam from the residue by flash chromatography (Si02 60F). Rf = 0.29 (toluene: methanol = 85: 15), Rt = 5.00.
  • 5
  • [ 51907-18-7 ]
  • [ 588-16-9 ]
  • 2-(7-hydroxy-6,7-dihydro-5H-[2]pyrindin-7-yl)-N-(3-methoxyphenyl)acetamide [ No CAS ]
YieldReaction ConditionsOperation in experiment
A solution of 50 mmol of N-(3-methoxyphenyl)acetamide [588-16-9] in 200 ml of tetrahydro- furan is cooled to -40°C. 110 mmol of butyllithium (1.6M in hexane) are added dropwise at -40 - -300C and the reaction mixture is subsequently stirred at 00C for 1 hour. The reaction mixture is cooled again to -40°C and a solution of 50 mmol of 5,6-dihydro[2]pyridin-7-one [51907-18-7] in 50 ml of tetrahydrofuran is added dropwise at this temperature. The reaction mixture is stirred at 0°C for 2-4 h and then poured into saturated aqueous ammonium chloride solution. The mixture is extracted with tert-butyl methyl ether and the combined organic extracts are washed with brine, dried with sodium sulphate and evaporated. From the residue the title compound is obtained by means of flash chromatography (SiO2 60F) on the basis of the Rf value.
  • 6
  • [ 51907-18-7 ]
  • 7-((tert-butoxycarbonyl)amino)-6,7-dihydro-5H-cyclopenta[c]pyridine 2-oxide [ No CAS ]
  • 7
  • [ 51907-18-7 ]
  • tert-butyl (3-((2,4-dimethoxybenzyl)amino)-6,7-dihydro-5H-cyclopenta[c]pyridin-7-yl)carbamate [ No CAS ]
  • tert-butyl (1-((2,4-dimethoxybenzyl)amino)-6,7-dihydro-5H-cyclopenta[c]pyridin-7-yl)carbamate [ No CAS ]
  • 8
  • [ 51907-18-7 ]
  • 5H-cyclopenta[c]pyridin-7(6H)-one oxime [ No CAS ]
YieldReaction ConditionsOperation in experiment
5.5 g With hydroxylamine hydrochloride; sodium acetate; In ethanol; water; for 12h;Reflux; Step 1 : 5,6-Dihydro-[2]pyrindin-7-one oxime 5,6-Dihydro-[2]pyrindin-7-one (synthesis described in EP2098513A1 , 5 g, 37.5 mmol), hydroxylamine hydrochloride (3.13 g, 45.1 mmol) and sodium acetate (3.70 g, 45.0 mmol) are dissolved in water (8 ml), the mixture is stirred and ethanol (8 ml) is added to the solution. The mixture is stirred under reflux for 2 hours. The mixture is concentrated and ethyl acetate is added, salts are filtered off and the solution is concentrated to give the title compound (Yield 5.5 g)
5.5 g With hydroxylamine hydrochloride; sodium acetate; In ethanol; water; for 2h;Reflux; 5,6-Dihydro-[2]pyrindin-7-one (synthesis described in EP2098513A1, 5 g, 37.5 mmol), hydroxylamine hydrochloride (3.13 g, 45.1 mmol) and sodium acetate (3.70 g, 45.0 mmol) are dissolved in water (8 ml), the mixture is stirred and ethanol (8 ml) is added to the solution. The mixture is stirred under reflux for 2 hours. The mixture isconcentrated and ethyl acetate is added, salts are filtered off and the solution is concentrated to give the title compound (Yield 5.5 g)LC (Method 1): tR = 0.61 mm; Mass spectrum (ES+): mlz = 149 [M+H].
  • 9
  • [ 51907-18-7 ]
  • 5H,6H,7H-cyclopenta[c]pyridin-7-amine [ No CAS ]
  • 10
  • [ 51907-18-7 ]
  • N-{5H,6H,7H-cyclopenta[c]pyridin-7-yl}carbamic acid tert-butyl aster [ No CAS ]
  • 11
  • [ 51907-18-7 ]
  • tert-butyl (3-((2,4-dimethoxybenzyl)amino)-6,7-dihydro-5H-cyclopenta[c]pyridin-7-yl)carbamate [ No CAS ]
  • 12
  • [ 51907-18-7 ]
  • tert-butyl (1-((2,4-dimethoxybenzyl)amino)-6,7-dihydro-5H-cyclopenta[c]pyridin-7-yl)carbamate [ No CAS ]
  • 13
  • 1-ethyl 3-methyl 4-(3-ethoxy-3-oxopropyl)pyridine-1,3(4H)-dicarboxylate [ No CAS ]
  • [ 51907-18-7 ]
  • 14
  • [ 51907-18-7 ]
  • ethyl 6,7-dihydro-5H-cyclopenta[c]pyridine-7-carboxylate [ No CAS ]
  • 15
  • [ 51907-18-7 ]
  • [ 792880-05-8 ]
  • 16
  • [ 51907-18-7 ]
  • [ 38622-91-2 ]
  • C9H8N2 [ No CAS ]
YieldReaction ConditionsOperation in experiment
To a solution of <strong>[51907-18-7]5H-cyclopenta[c]pyridin-7(6H)-one</strong> (300 mg, 2.25 mmol) in THF (10 mL) was added 1-((isocyanomethyl)sulfonyl)-4-methylbenzene (0.66 g, 3.38 mmol). The reaction was stirred at ambient temperature for 10 min. Then potassium 2-methylpropan-2-olate (0.5 g, 4.5 mmol) was added in five portions. The reaction was stirred at ambient temperature for 15 min. TLC showed the starting material was consumed. The organics were concentrated in vacuo and used for next step without further purification.
  • 17
  • [ 51907-18-7 ]
  • [ 588-16-9 ]
  • 7'-hydroxy-5,6-dihydro-1'H-spiro[cyclopenta[c]pyridine-7,4'-quinolin]-2'(3'H)-one [ No CAS ]
  • 7'-methoxy-5,6-dihydro-1'H-spiro[cyclopenta[c]pyridine-7,4'-quinolin]-2'(3'H)-one [ No CAS ]
 

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Technical Information

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