Reaction of cyclic phosphoranes with phosphorus pentasulfide

Abstract

The 2,2,2-trimethoxy-3,5-dimetiiyl-4-carbethoxy- and 2,2,2-trimethoxy-3,5-dimethyl-4-acetyl-1,2-oxaphospholenes react with phosphorus pentasulfide in methylene chloride solution at R~20‡ to give several phosphorus-containing products. The end reaction products are the 2-oxa-2-methoxy-3,5-dimethyl-4-carbethoxy- and 2-oxa-2-methoxy-3,5-dimethyl-4-acetyl-1,2-oxaphospholenes. © 1975 Plenum Publishing Corporation.