2-Bromoethanol → 3-{5-Amino-4-[3-(2-bromo-ethoxy)-benzoyl]-pyrazol-1-yl}-N-cyclopropyl-4-methylbenzamide

HRID 884814Notes

Reaction equation

HRID 884814 reaction equation
[NH2:1][C:2]1[N:6]([C:7]2[CH:8]=[C:9]([CH:16]=[CH:17][C:18]=2[CH3:19])[C:10]([NH:12][CH:13]2[CH2:15][CH2:14]2)=[O:11])[N:5]=[CH:4][C:3]=1[C:20](=[O:28])[C:21]1[CH:26]=[CH:25][CH:24]=[C:23]([OH:27])[CH:22]=1.[Br:29][CH2:30][CH2:31]O.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.N(C(OCC)=O)=NC(OCC)=O.[NH4+].[Cl-]>C1COCC1>[NH2:1][C:2]1[N:6]([C:7]2[CH:8]=[C:9]([CH:16]=[CH:17][C:18]=2[CH3:19])[C:10]([NH:12][CH:13]2[CH2:14][CH2:15]2)=[O:11])[N:5]=[CH:4][C:3]=1[C:20](=[O:28])[C:21]1[CH:26]=[CH:25][CH:24]=[C:23]([O:27][CH2:31][CH2:30][Br:29])[CH:22]=1

Participants

7

Reactant 5

HCID 108982-BromoethanolHCID 11776TriphenylphosphineHCID 25517Ammonium ChlorideHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 112458363-[5-amino-4-(3-hydroxy-benzoyl)-pyrazol-1-yl]-N-cyclopropyl-4-methylbenzamide

Product 1

HCID 580889463-{5-Amino-4-[3-(2-bromo-ethoxy)-benzoyl]-pyrazol-1-yl}-N-cyclopropyl-4-methylbenzamideYield 59.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a solution of 3-[5-amino-4-(3-hydroxy-benzoyl)-pyrazol-1-yl]-N-cyclopropyl-4-methyl-benzamide (472 mg, 1.26 mmol) in THF (dry, 20 mL) at 0° C. was added of 2-bromoethanol (785 mg, 6.3 mmol), PPh3 (1.3 g, 5.04 mmol) and diethyl azodicarboxylate (877 mg, 5.04 mmol) and the mixture was stirred at room temperature for 72 h. An aqueous solution of NH4Cl was added then the THF layer was isolated. The aqueous layer was extracted by EtOAc. The combined organic phase was washed by brine, purified by preparatory HPLC, to provide the product as a white solid (360 mg, 59%). HPLC (4 minute 10-90 gradient) tR 2.72 min; MS m/z 483.14/485.09 [M+H]+.

Workup

  1. extractionThe aqueous layer was extracted by EtOAc
  2. washThe combined organic phase was washed by brine
  3. custompurified by preparatory HPLC

Sources & evidence

ORD record
ord-9c8515fca8464af9af822e4292aa122e
Source dataset
uspto-grants-2012_08
Patent number
US08242117B2

Reaction notes

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