作者:Goverdhan Mehta、K. Sreenivas
DOI:10.1016/s0040-4039(01)02224-9
日期:2002.1
A new synthesis of tricyclic sesquiterpene, sterpurene 1 is reported. An intermolecular [2+2]-photocycloaddition 14→15 serves as a key step, which is promoted through the stabilisation of the enone excited state through a β-carbomethoxy substituent on the α,β-unsaturated enone moiety. A tricyclo[6.3.0.03,6]undecane based advanced intermediate 19 en route to 1, has been fragmented to the bicyclo[6.3
据报道,三环倍半萜烯,新戊烯1的新合成。分子间的[2 + 2]-光环加成14 → 15是关键步骤,通过α,β-不饱和烯酮部分上的β-甲氧基取代基使烯酮的激发态稳定,从而促进了这一过程。在到1的途中,基于三环[6.3.0.0 3,6 ]十一烷的高级中间体19已经碎裂成存在于紫杉烷型倍半萜中的双环[6.3.0]十一烷体系27。