Water → HCID 12899414, compound

Participants

Reaction Steps

20.5 Grams of 5-acetyloxy-3,4-dihydrocarbostyril was dissolved in 200 ml of acetic acid, into this solution, 16 g of bromine dissolved in 60 ml of acetic acid was added dropwise under water-cooled condition with stirring for 30 minutes and the reaction was continued for 2 hours at the same temperature. Then 300 ml of water added to this reaction mixture and allowed to stand for 3 hours, and crystals formed in the mixture were obtained by filtration and recrystallized from methanol. 21 Grams of 8-bromo-5-acetyloxy-3,4-dihydrocarbostyril was obtained as in the form of colorless needle-like crystals. Melting point: 237°-239° C.

Provenance & Evidence