Alkylating activity of polyphosphate ester in the course of the synthesis of benzimidazoles
作者:Giovanni Allunni Bistocchi、Giovanni De Meo、Mauro Pedini、Adolfo Ricci、Pierre Jacquignon
DOI:10.1135/cccc19851959
日期:——
5-Fluoro-2-(5-nitrofuryl)benzimidazole (I) was synthesized from 4-fluoro-1,2-diaminobenzene and 5-nitro-2-furoic acid using ethyl polyphosphate as cyclization reagent. N-Ethyl derivative was isolated as by-product in substantial amount.