Oxazol-5(4H)-ones. Part 7. New synthesis of oxazolo[5,4-b]pyridines
摘要:
Oxazolo[5,4-b]pyridines 4 are synthesized by heating the iminophosphoranes 1 and alkylideneoxazol-5(4H)-ones 2. At room temperature the reaction of 4-ethoxymethyleneoxazol-5(4H)-one 2f with iminophosphorane 1a yields the enamino lactone 6, which is, in turn, transformed by heating in acetic acid into the 2(1H)-pyridone 7.
A Facile Synthesis of 2,5,7-Triaryloxazolo [5,4-<i>b</i>]-pyridines
作者:R. K. Bansal、Jainendra K, Jain
DOI:10.1055/s-1986-31797
日期:——
A facile, one-step procedure for the synthesis of 2,5,7-triaryloxazolo [5,4-b]pyridines (3) from easily obtainable 2-aryl-4-arylmethylene-2oxazolin-5-ones (1) is reported.