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Chemical Structure| 76982-23-5 Chemical Structure| 76982-23-5
Chemical Structure| 76982-23-5

5-Bromoquinoxaline

CAS No.: 76982-23-5

4.5 *For Research Use Only !

Cat. No.: A201311 Purity: 97%

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Product Details of [ 76982-23-5 ]

CAS No. :76982-23-5
Formula : C8H5BrN2
M.W : 209.04
SMILES Code : BrC1=C2N=CC=NC2=CC=C1
MDL No. :MFCD02181615
Boiling Point : No data available
InChI Key :UJEGBESUCWOWNQ-UHFFFAOYSA-N
Pubchem ID :610437

Safety of [ 76982-23-5 ]

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

Calculated chemistry of [ 76982-23-5 ] Show Less

Physicochemical Properties

Num. heavy atoms 11
Num. arom. heavy atoms 10
Fraction Csp3 0.0
Num. rotatable bonds 0
Num. H-bond acceptors 2.0
Num. H-bond donors 0.0
Molar Refractivity 47.24
TPSA ?

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

25.78 Ų

Lipophilicity

Log Po/w (iLOGP)?

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

1.94
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

2.66
Log Po/w (WLOGP)?

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

2.39
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.

1.61
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

2.65
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

2.25

Water Solubility

Log S (ESOL):?

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

-3.48
Solubility 0.0685 mg/ml ; 0.000328 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.

-2.85
Solubility 0.293 mg/ml ; 0.0014 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

-4.19
Solubility 0.0136 mg/ml ; 0.0000652 mol/l
Class?

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

Moderately 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.

-5.69 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

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

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)

1.69

Application In Synthesis [ 76982-23-5 ]

* 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.

  • Upstream synthesis route of [ 76982-23-5 ]
  • Downstream synthetic route of [ 76982-23-5 ]

[ 76982-23-5 ] Synthesis Path-Upstream   1~21

  • 1
  • [ 34413-35-9 ]
  • [ 76982-23-5 ]
YieldReaction ConditionsOperation in experiment
85% With bromine In acetonitrile for 2.5 h; Reflux; Inert atmosphere General procedure: Bromine was added dropwise to a magnetically stirred refluxing solution of quinoxaline (1) or tetrahydroquinoxaline 15 or 19 in the relevant solvent. The resulting reaction mixture was heated at reflux temperature. The reaction was monitored by TLC or 1H NMR spectroscopy. After the desired time, the resulting reaction mixture was allowed to cool to room temperature and the solvent was removed under reduced pressure. The mixture was diluted with a saturated solution of sodium carbonate (10mL) and the mixture was extracted with ethyl acetate (2×25mL). Combined organic layers were washed with water, dried over Na2SO4 and concentrated. The crude was purified appropriate method described in below.
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 2
  • [ 91-19-0 ]
  • [ 76982-23-5 ]
  • [ 148231-12-3 ]
YieldReaction ConditionsOperation in experiment
70% With bromine In tetrachloromethane for 45 h; Reflux; Inert atmosphere General procedure: Bromine was added dropwise to a magnetically stirred refluxing solution of quinoxaline (1) or tetrahydroquinoxaline 15 or 19 in the relevant solvent. The resulting reaction mixture was heated at reflux temperature. The reaction was monitored by TLC or 1H NMR spectroscopy. After the desired time, the resulting reaction mixture was allowed to cool to room temperature and the solvent was removed under reduced pressure. The mixture was diluted with a saturated solution of sodium carbonate (10mL) and the mixture was extracted with ethyl acetate (2×25mL). Combined organic layers were washed with water, dried over Na2SO4 and concentrated. The crude was purified appropriate method described in below.
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 3
  • [ 16566-20-4 ]
  • [ 76982-23-5 ]
YieldReaction ConditionsOperation in experiment
14 g
Stage #1: With hydrogenchloride In water at 0℃; for 0.5 h;
Stage #2: With copper(I) bromide In water at 20℃; for 6 h;
Add 17 g of 5-aminobenzopyrazine to 50 ml of water, cool to 0°C, add 25 ml of concentrated hydrochloric acid, stir for 0.5 hour, add 10 g of copper bromide in portions, stir at room temperature for 6 hours, add water, extract and separate , Drying, concentration, the residue was separated on a silica gel column to obtain 14g 5-bromobenzopyrazine
References: [1] Patent: CN107793370, 2018, A, . Location in patent: Paragraph 0023; 0024.
  • 4
  • [ 34413-35-9 ]
  • [ 76982-23-5 ]
  • [ 148231-12-3 ]
YieldReaction ConditionsOperation in experiment
53% With bromine In tetrachloromethane for 0.75 h; Reflux; Irradiation; Inert atmosphere General procedure: A solution of quinoxaline (1) or tetrahydroquinoxaline 15 or 19 in CCl4 (10mL) was irradiated with a 500-W lamp in a 25-mL flask equipped with a reflux condenser. Bromine was added dropwise to the refluxing solution and the solution was irradiated at reflux temperature. The reaction was monitored by TLC or 1H NMR spectroscopy. The resulting reaction mixture was allowed to warm to room temperature and diluted with a saturated solution of sodium carbonate (10mL). The mixture was extracted with methylene chloride (2×25mL) and the combined organic layers were washed with water, dried over Na2SO4 and concentrated.
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 5
  • [ 34413-35-9 ]
  • [ 76982-23-5 ]
YieldReaction ConditionsOperation in experiment
43% With bromine In tetrachloromethane for 0.75 h; Reflux; Irradiation; Inert atmosphere General procedure: A solution of quinoxaline (1) or tetrahydroquinoxaline 15 or 19 in CCl4 (10mL) was irradiated with a 500-W lamp in a 25-mL flask equipped with a reflux condenser. Bromine was added dropwise to the refluxing solution and the solution was irradiated at reflux temperature. The reaction was monitored by TLC or 1H NMR spectroscopy. The resulting reaction mixture was allowed to warm to room temperature and diluted with a saturated solution of sodium carbonate (10mL). The mixture was extracted with methylene chloride (2×25mL) and the combined organic layers were washed with water, dried over Na2SO4 and concentrated.
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 6
  • [ 3476-89-9 ]
  • [ 91-19-0 ]
  • [ 50998-17-9 ]
  • [ 76982-23-5 ]
YieldReaction ConditionsOperation in experiment
35% With bromine In acetonitrile for 2.5 h; Reflux; Inert atmosphere General procedure: Bromine was added dropwise to a magnetically stirred refluxing solution of quinoxaline (1) or tetrahydroquinoxaline 15 or 19 in the relevant solvent. The resulting reaction mixture was heated at reflux temperature. The reaction was monitored by TLC or 1H NMR spectroscopy. After the desired time, the resulting reaction mixture was allowed to cool to room temperature and the solvent was removed under reduced pressure. The mixture was diluted with a saturated solution of sodium carbonate (10mL) and the mixture was extracted with ethyl acetate (2×25mL). Combined organic layers were washed with water, dried over Na2SO4 and concentrated. The crude was purified appropriate method described in below.
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 7
  • [ 91-19-0 ]
  • [ 76982-23-5 ]
References: [1] Synthesis, 2002, # 1, p. 83 - 86.
  • 8
  • [ 34413-35-9 ]
  • [ 76982-23-5 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[2] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[3] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[4] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[5] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[6] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[7] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 9
  • [ 3476-89-9 ]
  • [ 76982-23-5 ]
  • [ 148231-12-3 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[2] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[3] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[4] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 10
  • [ 34413-35-9 ]
  • [ 76982-23-5 ]
  • [ 148231-12-3 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[2] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 11
  • [ 528852-07-5 ]
  • [ 76982-23-5 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 12
  • [ 3694-52-8 ]
  • [ 76982-23-5 ]
References: [1] Patent: CN107793370, 2018, A, .
  • 13
  • [ 34413-35-9 ]
  • [ 76982-23-5 ]
  • [ 148231-12-3 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[2] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 14
  • [ 528852-07-5 ]
  • [ 76982-23-5 ]
  • [ 148231-12-3 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 15
  • [ 2423-66-7 ]
  • [ 76982-23-5 ]
  • [ 148231-12-3 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[2] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 16
  • [ 34413-35-9 ]
  • [ 50998-17-9 ]
  • [ 76982-23-5 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[2] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 17
  • [ 528852-07-5 ]
  • [ 76982-23-5 ]
  • [ 148231-12-3 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 18
  • [ 2423-66-7 ]
  • [ 50998-17-9 ]
  • [ 76982-23-5 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
[2] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 19
  • [ 528852-07-5 ]
  • [ 50998-17-9 ]
  • [ 76982-23-5 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 20
  • [ 91-19-0 ]
  • [ 50998-17-9 ]
  • [ 76982-23-5 ]
References: [1] Tetrahedron, 2017, vol. 73, # 12, p. 1618 - 1632.
  • 21
  • [ 131543-46-9 ]
  • [ 1575-36-6 ]
  • [ 76982-23-5 ]
References: [1] Organic Magnetic Resonance, 1980, vol. 14, # 4, p. 300 - 304.
 

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Technical Information

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