Triethylamine → Benzoic acid N'-[3-(2-bromo-phenyl)-propionyl]-N'-isopropyl-hydrazide

HRID 1724122Notes

Reaction equation

HRID 1724122 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][CH2:9][C:10]([OH:12])=O.[CH:13]([NH:16][NH:17][C:18](=[O:25])[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1)([CH3:15])[CH3:14].C(N(CC)CC)C.C1C=CC2N(O)N=NC=2C=1.CCN=C=NCCCN(C)C>CN(C=O)C>[Br:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][CH2:9][C:10]([N:16]([CH:13]([CH3:15])[CH3:14])[NH:17][C:18](=[O:25])[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1)=[O:12]

Participants

7

Reactant 5

HCID 8471TriethylamineHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 188691-Benzoyl-2-isopropylhydrazineHCID 757711-HydroxybenzotriazoleHCID 3160103-(2-Bromophenyl)propionic acid

Product 1

HCID 57560116Benzoic acid N'-[3-(2-bromo-phenyl)-propionyl]-N'-isopropyl-hydrazideYield 59.2%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A solution of (3-(2-bromophenyl)propionic acid (257 mg, 1.12 mmoles) and benzoic acid N′-isopropyl-hydrazide (200 mg, 1.12 mmoles) in DMF (6 mL) was treated with triethylamine (0.47 mL, 3.36 mmol), HOBT (182 mg, 1.34 mmoles) and EDCI (2.58 g, 1.34 mmol) at room temperature for 72 h. The reaction mixture was partitioned between water and dichloromethane. The organic layer was successively washed with water and brine, then dried over sodium sulfate, filtered and concentrated. The crude was absorbed on silica and purified on a silica gel column with a 20-30% ethyl acetate/hexanes gradient to afford the product as a solid (258 mg, 59%).

Workup

  1. customThe reaction mixture was partitioned between water and dichloromethane
  2. washThe organic layer was successively washed with water and brine
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customThe crude was absorbed on silica
  7. custompurified on a silica gel column with a 20-30% ethyl acetate/hexanes gradient

Sources & evidence

ORD record
ord-5ad780420de841fa82628f5280bca1f9
Source dataset
uspto-grants-2009_02
Patent number
US07485752B2

Reaction notes

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