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Chemical Structure| 5344-78-5 Chemical Structure| 5344-78-5

Structure of 5344-78-5

Chemical Structure| 5344-78-5

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Product Details of [ 5344-78-5 ]

CAS No. :5344-78-5
Formula : C7H6BrNO3
M.W : 232.03
SMILES Code : O=[N+](C1=CC(OC)=CC=C1Br)[O-]
MDL No. :MFCD00051511
InChI Key :KCOBIBRGPCFIGF-UHFFFAOYSA-N
Pubchem ID :79288

Safety of [ 5344-78-5 ]

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

Computational Chemistry of [ 5344-78-5 ] Show Less

Physicochemical Properties

Num. heavy atoms 12
Num. arom. heavy atoms 6
Fraction Csp3 0.14
Num. rotatable bonds 2
Num. H-bond acceptors 3.0
Num. H-bond donors 0.0
Molar Refractivity 49.46
TPSA ?

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

55.05 Ų

Lipophilicity

Log Po/w (iLOGP)?

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

1.7
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

2.68
Log Po/w (WLOGP)?

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

2.37
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.

2.18
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

0.35
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

1.86

Water Solubility

Log S (ESOL):?

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

-3.2
Solubility 0.145 mg/ml ; 0.000624 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.

-3.49
Solubility 0.0754 mg/ml ; 0.000325 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

-2.77
Solubility 0.399 mg/ml ; 0.00172 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.

-5.81 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

2.0 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)

2.15

Application In Synthesis of [ 5344-78-5 ]

* 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 [ 5344-78-5 ]

[ 5344-78-5 ] Synthesis Path-Downstream   1~4

  • 1
  • [ 5344-78-5 ]
  • [ 78137-76-5 ]
YieldReaction ConditionsOperation in experiment
87% A solution of boron tribromide (250 mmol) in dichloromethane (200 mL) was added drop wise over 1 h to a solution of the nitrobromide (100 mmol) in dichloromethane (250 mL) at -78° C. The reaction mixture was allowed to warm to rt and was maintained for 30 h. The reaction mixture was cooled to 0° C., quenched with water (300 mL) and the aqueous layer was extracted with ethyl acetate (2*300 mL). The combined organic layers were washed with saturated sodium bicarbonate (2*300 mL), dried (magnesium sulfate), and concentrated to provide the nitrophenol in 87percent yield as a brown crystalline solid.
87% A solution of boron tribromide (250 mmol) in dichloromethane (200 mL) was added drop wise over 1 h to a solution of the nitrobromide (100 mmol) in dichloromethane (250 mL) at -78 0C. The reaction mixture was allowed to warm to rt and was maintained for 30 h. The reaction mixture was cooled to 0 0C, quenched with <n="79"/>>yater (300 mL) and the aqueous layer was extracted with ethyl acetate (2 x 300 mL). The combined organic layers were washed with saturated sodium bicarbonate (2 x 300 mL), dried (magnesium sulfate), and concentrated to provide the nitrophenol in 87percent yield as a brown crystalline solid.
79% Step 1 . Synthesis of 4-bromo-3-nitrophenol (C3). 1 -Bromo-4-nnethoxy- 2-nitrobenzene (170 g, 0.73 mol) was dissolved in dichloromethane (1 .5 L) in a 5-liter, 3-necked flat-bottomed flask equipped with a thermometer, pressure-equalizing dropping funnel and exhaust gas scrubber (1 M aqueous sodium hydroxide). The solution was cooled to -78 °C under argon. Boron tribromide (176 ml_, 1 .86 mol) was dissolved in cold dichloromethane (1 .6 L, 0 °C); this was added to the cooled reaction via the dropping funnel over 2 hours. An exotherm brought the temperature to -55 °C. At the completion of the addition, the cooling bath was removed and the reaction was allowed to warm to RT and stir for 48 hours.The reaction mixture was added to cold water (2.0 L, ice/water bath) over 4 hours via a dropping funnel, maintaining the internal temperature below 20 °C. A scrubber (1 M aqueous sodium hydroxide) was used to prevent release of the HBr gas that was formed. The quenched mixture was stirred at RT for an additional hour, at which time the phases were separated and the aqueous layer was extracted with EtOAc (2.0 L); the combined organic layers (dichloromethane and EtOAc) were washed with saturated aqueous sodium bicarbonate solution (2 x 1 .2 L; lower phase was the organic layer), then with brine (1 L, lower phase was the aqueous layer), dried over magnesium sulfate and concentrated in vacuo. The residue was suspended in dichloromethane (320 ml_) and slurried overnight, and the solid was collected by filtration. The solid was dissolved in aqueous sodium hydroxide solution (2.0 M, 500 mL) and extracted with dichloromethane (500 mL). The dichloromethane layer was then extracted with aqueous sodium hydroxide solution (250 mL), and the combined aqueous layers were acidified to pH 2 with aqueous HCI (1 .0 M, 790 mL). The precipitated phenol was filtered and dried under vacuum at 40 °C for 18 hours to provide C3 as a solid. Yield: 125.5 g, 0.5757 mol, 79percent. 1H NMR (400 MHz, CD3OD) delta 6.95 (dd, J=8.8, 2.9 Hz, 1 H), 7.24 (d, J=2.9 Hz, 1 H), 7.57 (d, J=8.8 Hz, 1 H).
31% With boron tribromide; In dichloromethane;Reflux; To a solution of 1-bromo-4-methoxy-2-nitrobenzene (20 g, 82 mmol) in DCM (800 mL) was added dropwise BBr3 (19 mL, 207 mmol) in DCM (120 mL). The resulting mixture was heated to reflux overnight. The mixture was cooled in ice-water and was diluted by addition of water. Then the mixture was washed with saturated NaHCO3 and brine. The organic phase was dried over Na2SO4, concentrated under reduced pressure to give a residue, which was purified by column chromatography on silica gel to provide 4-bromo-3-nitrophenol (6 g, 31percent) as a solid: ?H NMR (CDC13): 3 7.57 (d, J = 8.8 Hz, 1H), 7.35 (d, J= 2.6 Hz, 1H), 6.94 (dd, J= 2.9, 8.6 Hz, 1H), 5.90 (br., 1H).
With boron tribromide; In dichloromethane; 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran; 4-Bromo-3-nitrophenol. To a stirred solution of 1-bromo-4-methoxy-2-nitrobenzene (2.32 g, 10 mmol) in 75 mL of dichloromethane at 0° C. was added BBr3 solution (1 M in DCM, 12 mL, 12 mmol) dropwise. The solution was allowed to warm to room temperature and stirred for 16 h. GC/MS showed starting material still left so another 12 mL of BBr3 solution was added and the reaction mixture refluxed for 4 h. The reaction mixture was cooled in ice and quenched with water. After washing successively with saturated NaHCO3(aq) and brine, the organic layer was dried over MgSO4, filtered and evaporated. The resulting yellow solid was flash chromatographed (25percent EtOAc/hexane) to give 1.5 g of product in (69percent) yield as a pale yellow solid: MS (EI) m/z 218 (M+).

  • 2
  • [ 5344-78-5 ]
  • [ 1826-67-1 ]
  • [ 81224-16-0 ]
YieldReaction ConditionsOperation in experiment
70.1% In tetrahydrofuran; at -40℃; for 1.5h; To a solution of 1-bromo-4-methoxy-2-nitrobenzene (33, 10.0 g, 43.1 mmol) in THF (100 mL)were added vinylmagnesium bromide (110 mL) dropwise at -40 C. The reaction mixture was sealedand stirred at -40 C for 1.5 hour. After warmed up to room temperature, the resulting solution wasquenched with sat. NH4Cl (120 mL) and extracted with ethyl acetate (2 × 150 mL). The combinedorganic layers were washed with brine (50 mL) and H2O (50 mL), dried over anhydrous Na2SO4,filtered and concentrated under reduced pressure. The residue was purified by silica gel column(petroleum ether/ethyl acetate = 2:1, v/v) to give 34 as a yellow solid (6.8 g, yield = 70.1%). LC-MS (ESI): m/z [M/M + 1]+ = 226.04/228.04.
  • 4
  • [ 5344-78-5 ]
  • [ 98-80-6 ]
  • [ 6933-49-9 ]
 

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