Synthetic studies towards naturally occurring γ-(<i>Z</i>)/(<i>E</i>)-alkylidenebutenolides through bimetallic cascade cyclization and an adventitious photoisomerization method
作者:Shrestha Chatterjee、Ranjan Kumar Acharyya、Pratik Pal、Samik Nanda
DOI:10.1039/d2ob00166g
日期:——
visible light-induced photoisomerization method of γ-(Z)-alkylidenebutenolides to their corresponding E-components was reported in this article. Initially, a series of naturally occurring enantiopure γ-(Z)-alkylidenebutenolides was synthesized by employing a “Pd–Cu” bimetallic cascade cyclization protocol. In the later part, the synthesized γ-(Z)-alkylidenebutenolides were photoisomerized in the presence
本文报道了一种通用且灵活的可见光诱导γ-( Z )-亚烷基丁烯内酯光致异构化为其相应的E-组分的方法。最初,通过采用“Pd-Cu”双金属级联环化方案合成了一系列天然存在的对映体纯 γ-( Z )-亚烷基丁烯内酯。在后面的部分中,合成的 γ-( Z )-亚烷基丁烯内酯在三重光敏剂存在下以合理可接受的产率对 γ-( E )-亚烷基丁烯内酯进行光异构化。采用所开发的方法实现了 goniobutenolides、hygrophorones、ramariolide D、melodorinols/乙酰-melodorinols、versicolactones 和 phomopsolidones 的全合成。