A new chiral route toward terpenoids. Annulation of carvone to trans- and cis-fused bicyclic synthons
作者:Jean-Pierre Gesson、Jean-Claude Jacquesy、Brigitte Renoux
DOI:10.1016/s0040-4020(01)89112-2
日期:1989.1
potentially useful chirons for synthesis of terpenes such as drimanes, labdanes and triterpenes. The stereoselectivity of the second alkylation step which determines the stereochemistry of the ring junction has been studied and the results explained by the model of Tomioka. Several types of products may be formed depending on the acid used and a rearrangement has been observed in one case.
从香芹酮开始,在C-6处连续进行两次烷基化反应1,然后进行酸催化的环化反应,生成新的双环酮,这对于合成萜烯(如杜曼,拉丹和三萜烯)可能是有用的Chirons。已经研究了确定环结的立体化学的第二个烷基化步骤的立体选择性,并通过Tomioka模型解释了结果。取决于所使用的酸,可能形成几种类型的产物,并且在一种情况下已经观察到重排。