Hydrochloric Acid → HCID 12899436, compound

Participants

Reaction Steps

22.7 grams of 8-bromo-5-methoxy-3,4-dihydrocarbostyril and 25 g of cuprous chloride are mixed with 100 ml of dimethyl sulfoxide and heated at 135°-140° C. for 4 hours under stirring conditions. After the reaction is completed, the reaction mixture is mixed with 200 g of ice and 50 ml of concentrated hydrochloric acid and stirred at a room temperature for 1 hour. The crystals thus precipitated are separated by filtration, washed first with diluted hydrochloric acid and then with water and dried. The crude crystals thus obtained are recrystallized from ligroin-benzene to obtain 13 g of 8-chloro-5-methoxy-3,4-dihydrocarbostyril in the form of pale organic needle-like crystals with a melting point of 165° C.

Provenance & Evidence