A regioselective annulation of butenolides. The total synthesis of (±) confertifolin
作者:Ben J.M. Jansen、Catharina T. Bouwman、Aede de Groot
DOI:10.1016/s0040-4039(00)76676-7
日期:1994.5
gamma-(Phenylsulfinyl)-alpha,beta-unsaturated aldehydes 2, prepared from alpha-(n-butyl-thio)methylene ketones 1 via addition of [(phenylthio)methyl]lithium followed by hydrolysis and oxidation, are converted into butenolides 4 or 5 depending upon the reaction conditions.