Pyridinium chloride → HCID 13290026, compound

Participants

Reaction Steps

A mixture of 6.0 g of 6,7-dichloro-5-methoxy-2-phenylbenzo[b]thiophene and 42 g of pyridine hydrochloride is stirred at 190°-195° for 4 hours. The slightly cooled reaction mixture is poured into a mixture of 800 g of ice and 10 ml of conc. hydrochloric acid. Extraction with ether, followed by washing and drying, yields 5.23 g of 6,7-dichloro-5-hydroxy-2-phenylbenzo[b]thiophene as an off-white solid, mp 122°-124°. Recrystallization from ether-hexane yields prisms, mp 124°-126°.

Provenance & Evidence