A new concerted approach to the formation of the trans-fused γ-lactone which bridges C-6 and C-7 in the germacranolide family of sesquiterpenoids is reported. Starting with enone 3 and using this approach, the synthesis of 2, a geometric isomer of the naturally occurring germacranolide 1, is outlined.
报告采用了一种新的协同方法来形成反式融合的δ-内酯,这种δ-内酯是连接germacranolide系列
倍半萜化合物中C-6和C-7的桥梁。从烯酮 3 开始,利用这种方法,概述了 2 的合成过程,它是天然存在的
愈创木酚内酯 1 的几何异构体。