N-bromobutanimide → HCID 58825057, compound

Participants

Reaction Steps

To an ice cold solution of 50 mg (0.113 mmol) of 6-(4-benzyloxy-phenyl)-7-cyclohexyl-pyrazolo[1,5-a]pyrimidine-2-carboxylic acid methyl ester in 2 mL of dichloromethane (DCM) was added a solution of 21 mg (0.118 mmol) of N-bromosuccinimide (NBS) in 1 mL of DCM and the resulting mixture was allowed to warm up to rt and stirred at rt overnight. The reaction mixture was concentrated to give a residue which was chromatographed on silica gel (5% ethyl acetate in dichloromethane) to afford 7 mg (11% yield) of 6-(4-benzyloxy-phenyl)-3-bromo-7-cyclohexyl-pyrazolo[1,5-a]pyrimidine-2-carboxylic acid methyl ester as a colorless oil as indicated by 1H NMR (90% purity); LC-MS—calcd for C27H26BrN3O3 [M++H]+: 520.12, found: 520.0.

Provenance & Evidence