An Approach to a Bislactone Skeleton: A Scalable Total Synthesis of (±)-Penifulvin A
作者:Dipendu Das、Ruchir Kant、Tushar Kanti Chakraborty
DOI:10.1021/ol500768w
日期:2014.5.16
total synthesis of the architecturally challenging sesquiterpenoid (±)-penifulvin A has been accomplished via a 12-step sequence with an overall yield of 16%. For the construction of this structurally complex tetracyclic molecule, the key steps used included 1,4-conjugate addition, a Pd(0) catalyzed cross-coupling reaction between an enol phosphate and trimethyl aluminum, Claisen rearrangement using
通过12个步骤的序列,完成了具有结构挑战性的倍半萜(±)-penifulvin A的高效且可扩展的总合成,总收率为16%。对于此结构复杂的四环分子的构建,使用的关键步骤包括1,4-共轭加成,烯醇式磷酸酯和三甲基铝之间的Pd(0)催化的交叉偶联反应,使用约翰逊原酸酯协议Ti( III)介导的还原性环氧开环-环化,路易斯酸催化环氧-醛重排,最后是底物控制的氧化级联内酯化过程。