据报道,独特的玫瑰烯二萜(-)-月桂烯-1-烯(1)的新自然来源以及首个与月桂烯有关的植物代谢物的结构。该新化合物(4)分离自新西兰罗汉松罗汉松(Podocarpus totara var waihoensis),命名为waihoensene,具有全氢4H-戊烯[6a,1- c ]茚环体系。Waihoensene是化合物的双键位置异构体,该化合物先前已通过对月桂烯进行酸处理而形成。
A Concise Total Synthesis of (+)‐Waihoensene Guided by Quaternary Center Analysis
作者:Cheng Peng、Piyush Arya、Zhiyao Zhou、Scott A. Snyder
DOI:10.1002/anie.202004177
日期:2020.8.3
target among angulartriquinane natural products. Here, we show that its polycyclic frame can be assembled concisely by using a strategically chosen quaternary center to guide the formation of the other three through judiciously selected C−C bond formation reactions. Those events, which included a unique Conia‐ene cyclization and a challenging Pauson–Khand reaction, afforded a 17‐step synthesis of the molecule
A racemic and scalable enantioselective total synthesis of (+)‐waihoensene was accomplished. (+)‐Waihoensene belongs to the diterpene natural product family, and it features an angulartriquinane substructure motif. Its tetracyclic [6.5.5.5]backbone is all‐cis‐fused, containing six contiguous stereocenters, four of which are quaternary. These structural features were efficiently installed by means