作者:Zhao Yang、Qiuyuan Tan、Yan Jiang、Jiaojiao Yang、Xiaojiao Su、Zhen Qiao、Wenqiang Zhou、Ling He、Hanyue Qiu、Min Zhang
DOI:10.1002/anie.202102416
日期:2021.6
We report here a concise, collective, and asymmetric total synthesis of sarpagine alkaloids and biogenetically related koumine alkaloids, which structurally feature a rigid cage scaffold, with L-tryptophan as the starting material. Two key bridged skeleton-forming reactions, namely tandem sequential oxidative cyclopropanol ring-opening cyclization and ketone α-allenylation, ensure concurrent assembly
我们在这里报告了一种简洁、集体和不对称的沙巴碱生物碱和生物遗传学相关的 koumine 生物碱的全合成,其结构特点是刚性笼支架,L-色氨酸作为起始材料。两个关键的桥接骨架形成反应,即串联顺序氧化环丙醇开环环化和酮 α-烯丙基化,确保笼式 sarpagine 支架的同时组装和必要的衍生手柄的安装。以共同的笼状中间体为分支点,利用其中的酮基和丙二烯基,全合成五种沙巴碱生物碱(affinisine、normacusine B、trinervine、N a-methyl-16-epipericyclivine 和 vellosimine)和三种 koumine 生物碱(koumine、koumimine 和N- demethylkoumine )和更复杂的笼支架已经完成。