3-Bromobenzaldehyde → 5-[(3-Bromo-benzylidene)-amino]-2-fluoro-benzoic acid methyl ester

HRID 2045438Notes

Reaction equation

HRID 2045438 reaction equation
[CH3:1][O:2][C:3](=[O:12])[C:4]1[CH:9]=[C:8]([NH2:10])[CH:7]=[CH:6][C:5]=1[F:11].[Br:13][C:14]1[CH:15]=[C:16]([CH:19]=[CH:20][CH:21]=1)[CH:17]=O>C1(C)C=CC=CC=1.C1(C)C=CC(S(O)(=O)=O)=CC=1>[CH3:1][O:2][C:3](=[O:12])[C:4]1[CH:9]=[C:8]([N:10]=[CH:17][C:16]2[CH:19]=[CH:20][CH:21]=[C:14]([Br:13])[CH:15]=2)[CH:7]=[CH:6][C:5]=1[F:11]

Participants

5

Reactant 2

HCID 765833-BromobenzaldehydeHCID 15621043Methyl 5-amino-2-fluorobenzoate

Product 1

HCID 674416335-[(3-Bromo-benzylidene)-amino]-2-fluoro-benzoic acid methyl esterYield 100%

Reagents, catalysts & solvents 2

HCID 6101p-Toluenesulfonic acidCatalystHCID 1140TolueneSolvent

Procedure

A mixture solution of 5-amino-2-fluoro-benzoic acid methyl ester (26 g, 153.8 mmol), 3-bromo-benzaldehyde (28.5 g, 153.8 mmol) and p-toluenesulfonic acid (590 mg, 3.2 mmol) in toluene (200 mL) was heated to reflux for 12 hours. Then the reaction mixture was cooled to room temperature. The solvent was removed in vacuo and the residue was washed with ether to afford 5-[(3-bromo-benzylidene)-amino]-2-fluoro-benzoic acid methyl ester (51.7 g, quant.) as a pale-white solid: MS calcd. for C15H11BrFlNO2 337.16, obsd. (ESI+) [(M+H)+]336.0 & 338.0.

Workup

  1. temperatureto reflux for 12 hours
  2. customThe solvent was removed in vacuo
  3. washthe residue was washed with ether

Sources & evidence

ORD record
ord-f9da05527084491c8c115ed690eee147
Source dataset
uspto-grants-2013_11
Patent number
US08586747B2

Reaction notes

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