An Unexpected Phosphine-Mediated Olefination of Salicylaldehydes with α-Methyl Allenoate
摘要:
An unexpected phosphine-mediated olefination of salicylaldehydes with -methyl allenoate is described. Thus, under the mediation of PPh3, six salicylaldehydes react with ethyl -methyl butadienoate forming the corresponding (1E, 3E)-1-(2-hydroxyphenyl)-3-carboethoxy-1,3-pentadienes in fair to excellent yields. A plausible mechanism for this reaction is also discussed.