Diglyme → HCID 14851833, compound

Participants

Reaction Steps

A mixture of 31 g (0.08 mol) of 1,3-dihydro-5-(2-fluoro phenyl)-7-iodo-1,4-benzodiazepin-2(2H)-one [ref. G. F. Field and L. H. Sternbaoh, Swiss patents Nos. 561,706; May 1975; and 562,222; April 1975], 20 g (0.09 mol) of phosphorus pentasulfide, 20 g of sodium bicarbonate and 300 ml of diglyme was stirred and heated to 80°-85° C. for 3 hours. The reaction mixture was then poured onto ice and diluted with water. After stirring for 30 minutes, the solid yellow product was filtered off, washed with water, 2-propanol and little ether. It was sucked dry in the funnel and further dried in vacuum to leave 26 g (80%) of 1,3-dihydro-5-(2-fluorophenyl)-7-iodo-1,4-benzodiazepine-2(2H)-thione which was further transformed as described below. Pure material was obtained by recrystallization from tetrahydrofuran/ethanol and had m.p. 242°-244° C.

Provenance & Evidence