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Chemical Structure| 3913-23-3 Chemical Structure| 3913-23-3

Structure of 3913-23-3

Chemical Structure| 3913-23-3

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Product Details of [ 3913-23-3 ]

CAS No. :3913-23-3
Formula : C8H8BrNO3
M.W : 246.06
SMILES Code : COC1=C(CBr)C=C(C=C1)[N+]([O-])=O
MDL No. :MFCD00007329
InChI Key :JRHMPHMGOGMNDU-UHFFFAOYSA-N
Pubchem ID :77516

Safety of [ 3913-23-3 ]

GHS Pictogram:
Signal Word:Danger
Hazard Statements:H314
Precautionary Statements:P280-P305+P351+P338-P310
Class:8
UN#:3261
Packing Group:

Computational Chemistry of [ 3913-23-3 ] Show Less

Physicochemical Properties

Num. heavy atoms 13
Num. arom. heavy atoms 6
Fraction Csp3 0.25
Num. rotatable bonds 3
Num. H-bond acceptors 3.0
Num. H-bond donors 0.0
Molar Refractivity 54.59
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.

1.92
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

2.28
Log Po/w (WLOGP)?

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

2.35
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.

1.41
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

0.68
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

1.73

Water Solubility

Log S (ESOL):?

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

-2.95
Solubility 0.279 mg/ml ; 0.00113 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.

-3.07
Solubility 0.208 mg/ml ; 0.000845 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

-3.17
Solubility 0.167 mg/ml ; 0.000679 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

Yes
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.

-6.18 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

3.0 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)

1.87

Application In Synthesis of [ 3913-23-3 ]

* 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 [ 3913-23-3 ]

[ 3913-23-3 ] Synthesis Path-Downstream   1~54

  • 1
  • [ 5804-49-9 ]
  • [ 3913-23-3 ]
YieldReaction ConditionsOperation in experiment
With triphenylphosphine; In carbon tetrabromide; acetonitrile; 13.9 g of carbon tetrabromide and then 8.9 g of triphenylphosphine are added in the course of 10 min to a solution of 5.2 g of <strong>[5804-49-9]2-methoxy-5-nitrophenylmethanol</strong> in 150 cm3 of acetonitrile. The mixture is stirred for 1 hour at a temperature close to 20 C. and then concentrated to dryness under reduced pressure (2.7 kPa) at 40 C. The crude product obtained is purified by chromatography on 25 g of silica (0.065-0.200 mm) contained in a column 4.0 cm in diameter [eluent: methylene chloride/petroleum ether (40/60 by volume)], collecting 125 cm3 fractions. Fractions 5 to 12 are combined and concentrated to dryness under reduced pressure (2.7 kPa) at 40 C. 5.6 g of 2-methoxy-5-nitrobenzyl bromide melting at 78 C. are thus obtained.
  • 2
  • [ 693-95-8 ]
  • [ 3913-23-3 ]
  • [ 77-78-1 ]
  • N-(2-methoxy-5-nitrobenzyl)-N-(1-methylthio-2-propenyl)formamide [ No CAS ]
  • 3
  • [ 1779-81-3 ]
  • [ 3913-23-3 ]
  • [ 143543-78-6 ]
  • 4
  • [ 50-00-0 ]
  • [ 100-17-4 ]
  • [ 3913-23-3 ]
YieldReaction ConditionsOperation in experiment
60% With sulfuric acid; acetic acid; sodium bromide; at 28 - 85℃; for 20h; Example 8: Synthesis of Compound XIII-6; Step 1: Synthesis of 2-(bromomethyI)-l-methoxy-4-nitrobenzene (2); A mixture of p-nitro anisole (1, 1 g, 6.529 mmol), paraformaldehyde (0.218 g), sodium bromide (0.8 g) in glacial acetic acid (1.3 mL) was heated to 85 C. H2SO4 (0.8 mL) and glacial acetic acid (0.8 mL) were gradually added to the mixture over 5 h. The resulting reaction mixture was then stirred for 3 h at 85 C and then for 12 h at 28 C. After completion of the reaction, the reaction mixture was extracted with diethyl ether and the ethereal extract was washed successively with 5% NaHC03 solution and water, dried over anhydrous sodium sulfate, and evaporated under reduced pressure to afford 2-(bromomethyl)- l-methoxy-4-nitrobenzene (2, 0.965 g, 60 %). NMR (400 MHz, CDC13): delta 8.30-8.22 (m, 2H), 7.00- 6.95 (d, 1 H), 4.55 (s, 2H), 4.05 (s, 3H).
  • 5
  • [ 85006-25-3 ]
  • [ 3913-23-3 ]
  • C18H26N2O8 [ No CAS ]
  • 6
  • [ 3913-23-3 ]
  • [ 50741-92-9 ]
  • 7
  • [ 3913-23-3 ]
  • [ 146-92-9 ]
  • (2R,3S,4R,5R)-2-Hydroxymethyl-5-[6-imino-1-(2-methoxy-5-nitro-benzyloxy)-1,6-dihydro-purin-9-yl]-tetrahydro-furan-3,4-diol; compound with perchloric acid [ No CAS ]
  • 8
  • [ 3913-23-3 ]
  • [ 60013-09-4 ]
  • C48H62N6O8(2+)*2Br(1-) [ No CAS ]
YieldReaction ConditionsOperation in experiment
70% With carbon tetrabromide; triphenylphosphine; In dichloromethane; at 20℃; for 12h; General procedure: IF3a (0403) A mixture of IF2a (1.60 g, 9.58 mmol), CBr4 (3.81 g, 11.50 mmol) and Ph3P (3.02 g, 11.50 mmol) in CH2Cl2 (100 mL) was allowed to stir at rt for 12 h. After removal of the solvent, the residue was purified by flash column chromatography (EtOAc/hexanes) to afford IF3a as a white solid (1.22 g, 55%). 1H NMR (CDCl3, 600 MHz) delta 8.20 (d, J=1.2 Hz, 1H), 8.08 (dd, J=8.4, 2.4 Hz, 1H), 7.36 (d, J=9.0 Hz, 1H), 4.53 (s, 2H), 1.58 (s, 3H).
Example 12 Preparation of 3-aryl-1-(2-methoxy-5-nitrophenylmethyl)indole-2-carboxylic acid ten member sublibrary Following the procedure of Examples 10(a)-10(f), with the exception of substitution of 2-methoxy-5-nitrobenzyl bromide for 6-chloropiperonyl chloride in step (e), the title sublibrary was prepared (40 mg). MS m/e (M-H)-: 401.0, 431.0, 435.0, 451.0, 453.0, 461.0, 469.0, 477.0, 493.0.
  • 11
  • [ 5804-49-9 ]
  • [ 10035-10-6 ]
  • [ 3913-23-3 ]
  • 12
  • [ 455-19-6 ]
  • [ 3913-23-3 ]
  • [ 16730-20-4 ]
  • 5-[(2-methoxy-5-nitro-benzyl)-(4-trifluoromethyl-benzyl)-amino]-1<i>H</i>-indole-2-carboxylic acid [ No CAS ]
  • 13
  • [ 3913-23-3 ]
  • [ 340255-41-6 ]
  • 2-Methoxy-5-nitrobenzyl (4,5-dimethoxy-2-[(phenylacetyl)amino]methyl}phenyl)acetate [ No CAS ]
  • 14
  • [ 3913-23-3 ]
  • (4-(2-Hydroxyethoxy)-5-methoxy-2-[(phenylacetyl)amino]methyl}phenyl)acetic acid [ No CAS ]
  • [ 340255-37-0 ]
  • 15
  • [ 3913-23-3 ]
  • [ 81477-94-3 ]
  • 2-(benzhydrylidene-amino)-3-(2-methoxy-5-nitro-phenyl)-propionic acid <i>tert</i>-butyl ester [ No CAS ]
  • 16
  • [ 3913-23-3 ]
  • adipic acid, monoamide with amino-functionalized polystyrene [ No CAS ]
  • 2-methoxy-5-nitrobenzyl adipate, amide with amino-functionalized polystyrene [ No CAS ]
  • 17
  • [ 3913-23-3 ]
  • 2-methoxy-5-nitrobenzyl sulfonamide [ No CAS ]
  • 18
  • [ 3913-23-3 ]
  • [ 736933-15-6 ]
  • (2S)-2-benzhydryloxy-1-(2,5-dimethoxy-phenyl)-3-(2-methoxy-5-nitro-phenyl)-propan-1-one [ No CAS ]
  • (2R)-2-benzhydryloxy-1-(2,5-dimethoxy-phenyl)-3-(2-methoxy-5-nitro-phenyl)-propan-1-one [ No CAS ]
  • 19
  • cyclopropanecarboxylic acid (1-isopropyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-amide [ No CAS ]
  • [ 3913-23-3 ]
  • cyclopropanecarboxylic acid [1-isopropyl-2-(2-methoxy-5-nitro-benzylsulfanyl)-1<i>H</i>-benzoimidazol-5-yl]-amide [ No CAS ]
  • 20
  • 1-<i>tert</i>-butyl-3-(1-ethyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[1-ethyl-2-(2-methoxy-5-nitro-benzylsulfanyl)-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 21
  • [ 874743-87-0 ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[2-(2-methoxy-5-nitro-benzylsulfanyl)-1-propyl-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 22
  • 1-<i>tert</i>-butyl-3-(1-cyclopropyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[1-cyclopropyl-2-(2-methoxy-5-nitro-benzylsulfanyl)-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 23
  • 1-<i>tert</i>-butyl-3-(1-butyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[1-butyl-2-(2-methoxy-5-nitro-benzylsulfanyl)-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 24
  • 1-<i>tert</i>-butyl-3-[1-(2-methoxy-ethyl)-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[1-(2-methoxy-ethyl)-2-(2-methoxy-5-nitro-benzylsulfanyl)-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 25
  • 1-<i>tert</i>-butyl-3-(1-phenyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[2-(2-methoxy-5-nitro-benzylsulfanyl)-1-phenyl-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 26
  • 1-(1-benzyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-3-<i>tert</i>-butyl-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-[1-benzyl-2-(2-methoxy-5-nitro-benzylsulfanyl)-1<i>H</i>-benzoimidazol-5-yl]-3-<i>tert</i>-butyl-urea [ No CAS ]
  • 27
  • 1-<i>tert</i>-butyl-3-(1-pentyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[2-(2-methoxy-5-nitro-benzylsulfanyl)-1-pentyl-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 28
  • 1-<i>tert</i>-butyl-3-(1-pyridin-4-ylmethyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[2-(2-methoxy-5-nitro-benzylsulfanyl)-1-pyridin-4-ylmethyl-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 29
  • 1-<i>tert</i>-butyl-3-(1-pyridin-3-ylmethyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[2-(2-methoxy-5-nitro-benzylsulfanyl)-1-pyridin-3-ylmethyl-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 30
  • 1-<i>tert</i>-butyl-3-(1-pyridin-2-ylmethyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[2-(2-methoxy-5-nitro-benzylsulfanyl)-1-pyridin-2-ylmethyl-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 31
  • 1-<i>tert</i>-butyl-3-(1-phenethyl-2-thioxo-2,3-dihydro-1<i>H</i>-benzoimidazol-5-yl)-urea [ No CAS ]
  • [ 3913-23-3 ]
  • 1-<i>tert</i>-butyl-3-[2-(2-methoxy-5-nitro-benzylsulfanyl)-1-phenethyl-1<i>H</i>-benzoimidazol-5-yl]-urea [ No CAS ]
  • 32
  • [ 853655-48-8 ]
  • [ 3913-23-3 ]
  • [ 853655-27-3 ]
  • 33
  • [ 889675-13-2 ]
  • [ 3913-23-3 ]
  • [3-aminooxalyl-1-(2-methoxy-5-nitro-benzyl)-2-methyl-1<i>H</i>-indol-4-yloxy]-acetic acid <i>tert</i>-butyl ester [ No CAS ]
  • 34
  • tert-butyl 4-({3-[amino(oxo)acetyl]-2-methyl-1H-indol-5-yl}oxy)butanoate [ No CAS ]
  • [ 3913-23-3 ]
  • 4-[3-aminooxalyl-1-(2-methoxy-5-nitro-benzyl)-2-methyl-1<i>H</i>-indol-5-yloxy]-butyric acid <i>tert</i>-butyl ester [ No CAS ]
  • 35
  • [ 3913-23-3 ]
  • [ 158144-85-5 ]
  • [ 954123-81-0 ]
YieldReaction ConditionsOperation in experiment
71% With sodium hydride; In N,N-dimethyl-formamide; at 0 - 20℃; for 1.5h; tert-Butyl 4-((2-methoxy-5-nitrobenzyloxy)methyl)-4-phenylpiperidine-1-carboxylate. 2-(Bromomethyl)-1-methoxy-4-nitrobenzene (100.0 mg, 0.34 mmol) and tert-butyl 4-(hydroxymethyl)-4-phenylpiperidine-1-carboxylate (93.0 mg, 0.38 mmol) were combined in dimethylformamide (4 mL) and cooled to 0 C. The reaction was treated with sodium hydride (9.0 mg, 0.38 mmol), stirred at 0 C. for 1 hr and at room temperature for 30 min. The reaction mixture was diluted with water and extracted with ethyl acetate (2×). The organic layers were pooled together, washed with brine (2×), dried over sodium sulfate, and concentrated. Column chromatography on silica gel (15% ethyl acetate/hexanes) gave 110 mg (71%). 1H-NMR (CDCl3, 500 MHz) delta 8.11 (dd, J=6.1, 3.1 Hz, 1H), 8.08 (d, J=2.8 Hz, 1H), 7.34 (m, 4H), 7.21-7.24 (m, 1H), 6.80 (d, J=8.9 Hz, 1H), 4.37 (s, 2H), 3.85 (s, 3H), 3.74-3.75 (m, 2H), 3.48 (s, 2H), 3.02-3.07 (m, 2H), 2.21-2.24 (m, 2H), 1.87-1.93 (m, 2H), 1.43 (s, 9H). Mass spec.: 479.16 (MNa)+.
  • 36
  • [ 3913-23-3 ]
  • [ 5804-49-9 ]
  • 37
  • [ 3913-23-3 ]
  • 2-Methoxy-5-nitrobenzyl (4-{2-[(chlorocarbonyl)oxy]ethoxy}-5-methoxy-2-[(phenylacetyl)amino]methyl}phenyl)acetate [ No CAS ]
  • 38
  • [ 3913-23-3 ]
  • 2-Methoxy-5-nitrobenzyl (5-methoxy-4-(2-[(4-nitrophenoxy)carbonyl]oxy}ethoxy)-2-[(phenylacetyl)amino]methyl}phenyl)acetate [ No CAS ]
  • 39
  • [ 3913-23-3 ]
  • N-(2-Methoxy-5-nitro-benzyl)-hydroxylamine; compound with trifluoro-acetic acid [ No CAS ]
  • 43
  • 3-benzhydryl-4-piperidone hydrochloride [ No CAS ]
  • [ 3913-23-3 ]
  • 3-(diphenylmethyl)-1-(2-methoxy-5-nitrobenzyl)piperidin-4-one [ No CAS ]
YieldReaction ConditionsOperation in experiment
93% With sodium hydrogencarbonate; In DMF (N,N-dimethyl-formamide); at 20℃; for 30h; A mixture of 9.1 g (30 mmol) of 3-benzhydryl-4-piperidinone hydrochloride, 7.38 g (30.0 mmol) of <strong>[3913-23-3]2-methoxy-5-nitrobenzyl bromide</strong> and 5 g (60 mmol) of sodium hydrogen carbonate in 40 ml of dimethylformamide (DMF) was stirred for 30 hours at room temperature.. To the reaction mixture were added 250 ml of ethyl acetate, 400 ml of water and 50 ml of hexane, the mixture was shaken, and the organic layer was separated, and washed with water.. The organic layer was dried over MgSO4 (anhydrous) and concentrated under reduced pressure.. ethanol was added to the residue and the precipitated crystals were collected by filtration and dried to obtain 12.0 g of the title compound as crystals (yield:93%). mp 119-120C.1H-NMR (CDCl3) delta: 2.42-4.50 (m, 2H), 2.54-2.67 (m, 2H), 2.78-2.82 (m, 2H), 3.44-3.50 (m, 1H), 3.56 (s, 2H), 3.87 (s, 3H), 4.56 (d, 1H, J=11.2Hz), 6.87 (d, 1H, J=8.8Hz), 7.05-7.32 (m, 10H), 8. 16 (dd, 1H, J=3.2Hz, J=2.8Hz), 8.33 (d, 1H). Elemental analysis: C26H26N2O4Calculated: C, 72.54; H, 6.09; N, 6.51. Found: C, 72.37; H, 5.92; N, 6.41.
93% With sodium hydrogencarbonate; In N,N-dimethyl-formamide; at 20℃; for 30h; A mixture of 11 (9.1 g, 30 mmol), 2-methoxy-5-nitrobenzylbromide (7.4 g, 30 mmol), NaHCO3 (5.0 g, 60 mmol) and DMF (40 mL) was stirred at room temperature for 30 h. After diluting with EtOAc (250 mL), hexane (50 mL) and H2O (400 mL), the phases were separated. The organic phase was washed with H2O, dried and concentrated. The residue was treated with EtOH to give 13v as colorless crystals (12.0 g, 93%). Mp 119-120 C. 1H NMR (CDCl3) delta: 2.42-4.50 (m, 2H), 2.54-2.67 (m, 2H), 2.78-2.82 (m, 2H), 3.44-3.50 (m, 1H), 3.56 (s, 2H), 3.87 (s, 3H), 4.56 (d, J = 11.2 Hz, 1H), 6.87 (d, J = 8.8 Hz, 1H), 7.05-7.32 (m, 10H), 8.14-8.17 (m, 1H), 8.33 (d, J = 2.8 Hz, 1H). Anal. Calcd for C26H26N2O4: C, 72.54; H, 6.09; N, 6.51. Found: C, 72.37; H, 5.92; N, 6.41.
  • 44
  • 3-(4,4'-difluorobenzhydryl)-4-piperidone hydrochloride [ No CAS ]
  • [ 3913-23-3 ]
  • 3-[Bis(4-fluorophenyl)methyl]-1-(2-methoxy-5-nitrobenzyl)-4-piperidinone [ No CAS ]
YieldReaction ConditionsOperation in experiment
With potassium carbonate; In DMF (N,N-dimethyl-formamide); at 20℃; for 3h; To a solution of 3 g of 3-[bis(4-fluorophenyl)methyl]-4-piperidinone hydrochloride and 2.46 g of <strong>[3913-23-3]2-methoxy-5-nitrobenzyl bromide</strong> in 20 ml of dimethylformamide was added 4.2 mg of potassium carbonate with stirring at room temperature.. After stirring for 3 hours, 50 ml of ethyl acetate and 50 ml of brine were added thereto.. The ethyl acetate layer was separated and washed with water, and the solvent was distilled off under reduced pressure.. The residue was purified by subjecting it to silica gel column chromatography (11 g, ethyl acetate: hexane = 1: 1) to obtain the title compound as an oil.1H-NMR (CDCl3) delta: 2.35-2.90 (m, 6H), 3.57 (s, 2H), 3.88 (s, 3H), 4.55 (d, 1H, J=11 Hz), 6.80-7.28, 8.15-8.35 (m, 11H).
  • 45
  • [ 3913-23-3 ]
  • [ 143-33-9 ]
  • 2-methoxy-5-nitrophenylacetonitrile [ No CAS ]
YieldReaction ConditionsOperation in experiment
In dimethyl sulfoxide; at 80℃; for 0.166667h; To a solution of <strong>[3913-23-3]2-methoxy-5-nitrobenzyl bromide</strong> (984 mg) in dimethylsulfoxide (5 mL) was added sodium cyanide (216 mg) and the mixture was stirred at 80 degrees for 10 minutes. To the reaction mixture was added water and the mixture was extracted with ethyl acetate: The organic layer was washed with water and a saturated aqueous solution of sodium chloride, successively, dried over anhydrous sodium sulfate, and concentrated to give the title compound having the following physical data. The obtained title compound was used to next reaction without further purification. TLC: Rf 0.30 (ethyl acetate : hexane = 3 : 7).
  • 46
  • [ 3913-23-3 ]
  • [ 143-33-9 ]
  • [ 99459-52-6 ]
YieldReaction ConditionsOperation in experiment
In ethanol; water; at 70℃; for 1.5h; 2-BROMOMETHYL-L-METHOXY-4-NITRO-BENZENE (25 g) was dissolved in warm EtOH (45 mL) and stirred while slowly adding a solution of NACN (6.0 g in 12 mL H20) at 70 C. After the addition was complete, the reaction was stirred at 70 C for 90 min. The inorganic solid, which separated on cooling, was collected and washed well with CH3CN. The CH3CN filtrate was filtered again giving further inorganic solid, and again washed with CH3CN. The FINAL CH3CN filtrate was evaporated giving a red-brown solid. This solid was triturated with CH2C12 until the washings were colorless. Evaporation of the CH2C12 filtrate gave (2- methoxy-5-nitrophenyl) -acetonitrile as a red-brown solid, which was used without further purification.
  • 47
  • [ 3913-23-3 ]
  • [ 5188-07-8 ]
  • [ 288151-80-4 ]
YieldReaction ConditionsOperation in experiment
In DMF (N,N-dimethyl-formamide); for 16h; Sodium thiomethoxide (0.469 g) was added to a solution of <strong>[3913-23-3]2-methoxy-5-nitrobenzyl bromide</strong> (1.5 g) in dimethylformamide (25 ml). The mixture was stirred for 16 h, solvent removed at reduced pressure and the residue dissolved in ethyl acetate and washed with water and brine, dried (Na2SO4) and solvent removed at reduced pressure to give the title compound (1.2 g) as a yellow solid
  • 48
  • [ 3913-23-3 ]
  • [ 14062-18-1 ]
  • C19H21NO6 [ No CAS ]
YieldReaction ConditionsOperation in experiment
With sodium hexamethyldisilazane; In tetrahydrofuran; at -70 - 20℃; for 16h; EXAMPLE 7; 5-(2-furyl)-4-[2-(2-methoxy-5-nitrophenyl)-1-(4-methoxyphenyl)ethyl-1,3-thiazol-2-amine; Step A; NaHMDS (30.0 mL, 30.0 mmol) was added to a -70C solution of ethyl 4-methoxyphenyl acetate (5.83 g, 30.0 mmol) and <strong>[3913-23-3]2-methoxy-5-nitrobenzyl bromide</strong> (7.38 g, 30.0 mmol) in 200 mL of THF. The reaction mixture was stirred to rt over a period of 16 h after which time the solvent was evaporated and the residue partitioned between 150 mL of EtOAc and 20 mL of saturated ammonium chloride. The aqueous phase was washed 2 x 25 mL of EtOAc and the combined organic extracts were washed with brine (20 mL) and dried over MgS04. The organic phase was dried, concentrated and chromatographed (0-50% EtOAc/hexane) to afford the monoalkylated target.
  • 49
  • [ 110-91-8 ]
  • [ 3913-23-3 ]
  • [ 503183-44-6 ]
YieldReaction ConditionsOperation in experiment
97% With triethylamine; In tetrahydrofuran; water; A. A solution of <strong>[3913-23-3]2-bromomethyl-1-methoxy-4-nitrobenzene</strong> (1.23 g, 5 mmol), triethylamine (0.3 mL) and morpholine (1.0 mL, 11.5 mmol) in 45 mL of THF was heated at 60 C. for 30 minutes. The solvent was evaporated in vacuo. The residue was mixed with water (20 mL) and extracted with ether. Organic layers was separated, dried over MgSO4 and concentrated in vacuo to yield a yellow solid (1.222 g, 97%), which was used in the next step without further purification.
  • 50
  • [ 3913-23-3 ]
  • [ 591-35-5 ]
  • 3-[(3,5-Dichlorophenoxy)methyl]-4-methoxyphenylamine hydrochloride [ No CAS ]
YieldReaction ConditionsOperation in experiment
With HCl conc.; potassium carbonate; hydrazine hydrate;nickel; In methanol; ethanol; acetone; 3-[(3,5-Dichlorophenoxy)methyl]-4-methoxyphenylamine hydrochloride. A mixture of <strong>[3913-23-3]2-bromomethyl-1-methoxy-4-nitrobenzene</strong> (2.46 g, 0.01 M), 3,5-dichlorophenol (1.79 g, 0.011 M), and potassium carbonate (2.07 g, 0.015 M) in acetone (150 mL) was intensively stirred for 5 min, then dicyclohexano-18-crown-6 (80 mg) was added, and the whole was brought to reflux under continued stirring. After 4 h, the mixture was cooled to r.t., and stirring was continued for overnight. The solvent was evaporated in vacuo. A yellowish-white solid was triturated with water (200 mL) and stirred for 30 min. Liquids were removed from the flask using reversed filtration, and the resulting solid was diluted with EtOH (75 mL). To this suspension was added wet Ni Raney (2.0 g), and the whole was heated up to 60 C. A solution of hydrazine monohydrate (100%, 2.0 mL) in EtOH (5 mL) was added dropwise within 30 min under continued stirring. As soon as the mixture cleared, the whole was brought to reflux and kept under stirring for 1 h. The solution was cooled to room temperature, decanted from catalyst, and concentrated in vacuo. Oily residue was dissolved in MeOH (30 mL) and treated with HCl conc. (12 mL). The formed suspension was kept in the freezer overnight and then filtered. Microcrystals, yield 1.55 g. Filtrate was concentrated in vacuo, and the formed precipitate filtered to give additional amount of product (0.410 g). Total yield of the title compound was 1.960 g (59%).
  • 51
  • [ 1336-21-6 ]
  • [ 68832-13-3 ]
  • [ 3913-23-3 ]
  • [ 7087-68-5 ]
  • [ 346732-23-8 ]
YieldReaction ConditionsOperation in experiment
95% In water; N,N-dimethyl-formamide; a [(2R)-1-(2-Methoxy-5-Nitrobenzyl)Pyrrolidinyl]Methanol Hydrochloride To <strong>[3913-23-3]2-methoxy-5-nitrobenzyl bromide</strong> (6.11 g, 24.8 mmol) dissolved in N,N-dimethylformamide (25 mL) was added Hunig's base (3.5 g, 27.2 mmol) followed by R-(-)-2-pyrrolidinemethanol (2.4 g, 24.8 mmol) and the reaction mixture was stirred at room temperature for 16 h. The N,N-dimethylformamide was removed, the residue treated with water (100 mL) followed by aqueous ammonium hydroxide until basic and extracted with ethyl acetate (3*100 mL). The ethyl acetate extracts were combined, washed with water (3*100 mL), dried over magnesium sulphate, filtered, and evaporated to give the free base of the title compound as a yellow oil (6.0 g). Treatment of an ethanol solution of the free base with ethanol/hydrogen chloride afforded the title compound (7.4 g, 95%) as a light yellow solid; MS: m/z 267 [M+H]+.
  • 52
  • [ 3913-23-3 ]
  • [ 1074-82-4 ]
  • [ 180080-49-3 ]
YieldReaction ConditionsOperation in experiment
94% With hydrogenchloride; In N-methyl-acetamide; water; ethyl acetate; Example 117 Synthesis of N-(2-methoxy-5-nitrophenylmethyl)phthalimide Potassium phthalimide (836 mg) was added to a solution of <strong>[3913-23-3]2-methoxy-5-nitrobenzyl bromide</strong> (1.01 g) in dimethylformamide (41 ml) and stirred at room temperature for 10 minutes. Water and 2 N HCl were added to the reaction mixture and extraction was performed with ethyl acetate; then, the organic layer was washed successively with a saturated aqueous sodium bicarbonate solution and a saturated aqueous sodium chloride solution, dried with anhydrous sodium sulfate and concentrated under reduced pressure. The resulting residue was washed successively with ethyl acetate and hexane to give 1.2 g of the titled compound (yield, 94%). 1H-NMR(DMSO-d6) delta: 3.97(3H,s), 4.80(2H,s), 7.26(1H, d, J=9.3 Hz), 7.82-7.93(4H,m), 7.99(1H, d, J=2.9 Hz), 8.40(1H, dd, J=9.3, 2.9 Hz)
  • 53
  • [ 3913-23-3 ]
  • [ 99459-52-6 ]
YieldReaction ConditionsOperation in experiment
In methanol; diethyl ether; water; 10 cm3 of a 3.5M potassium cyanide solution are added to a solution of 6.2 g of <strong>[3913-23-3]2-methoxy-5-nitrobenzyl bromide</strong> in 60 cm3 of methanol. The mixture is stirred under reflux for 4 hours and then concentrated to dryness under reduced pressure. The residue obtained is taken up in 100 cm3 of diethyl ether and 100 cm3 of water. The organic phase is dried over magnesium sulphate and then concentrated to dryness under reduced pressure (2.7 kPa) at 35 C. The crude product obtained is purified by chromatography on 40 g of silica (0.065-0.200 mm) contained in a column 3 cm in diameter (eluent: methylene chloride), collecting 20 cm3 fractions. Fractions 3 to 8 are combined and concentrated to dryness under reduced pressure (2.7 kPa) at 40 C. 4.2 g of 2-methoxy-5-nitrophenylacetonitrile melting at 100 C. are thus obtained. <strong>[3913-23-3]2-Methoxy-5-nitrobenzyl bromide</strong> may be prepared in the following way:
  • 54
  • [ 3913-23-3 ]
  • [ 10496-75-0 ]
YieldReaction ConditionsOperation in experiment
100% In ethanol; water; EXAMPLE K Preparation of 2-methoxy-5-nitrobenzylnitrile. To a solution of sodium cyanide (6 g, 121.9 mmole) in water (5.3 ml) at 70 C. was added in small portions with stirring a hot solution of 2-methoxy-5-nitrobenzylbromide (25 g., 101.6 mmole) in ethanol (15 ml). The reaction mixture was then refluxed for 1.5 hours, cooled, and filtered. The filter cake was washed with acetonitrile and the filtrate was evaporated in vacuo to yield 2-methoxy-5-nitrobenzylnitrile (19.5 g., 100 percent) as a tan solid. The product was characterized by: 13 C NMR (CDCl3) 161.4, 141.0, 125.7, 124.6, 119.8, 116.5, 110.2, 56.3, 18.8.
 

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