Sodium Thiosulfate → 6-(4-Acetoxypiperidino)-5-bromo-3,4-dihydrocarbostyril

Participants

Reaction Steps

To a solution of 300 mg of 6-(4-acetoxypiperidino)-3,4-dihydrocarbostyril in 7 ml of chloroform was added 370 mg of N-bromosuccinimide, and the mixture was stirred at room temperature for 1 hr. Then, an aqueous sodium thiosulfate was added to the reaction mixture, and the mixture was extracted with chloroform. The extract was washed with brine, dried and evaporated under a reduced pressure. The crude mixture was purified by a silica gel column chromatography to give 87 mg of 6-(4-acetoxypiperidino)-7-bromo-3,4-dihydrocarbostyril and 41 mg of 6-(4-acetoxypiperidino)-5-bromo-3,4-dihydrocarbostyril.

Provenance & Evidence