A new approach to annelated butenolides. The total synthesis of (±)-isodrimenin
作者:B. J. M. Jansen、R. M. Peperzak、Ae. de Groot
DOI:10.1002/recl.19871060906
日期:——
A newapproach to annelated butenolides has been developed starting from trans-5,5,8a-trimethyl-3,4,4a,5,6,7,8,8a-octahydro-1(2H)-naphthalenone (3) and cyclohexanones. A reaction sequence consisting of formylation of the enolates of these ketones, protection of the formyl group as its dioxolane and addition of methoxy(phenylthio)methyllithium has been used to introduce the necessary functionalized