Asymmetric Total Synthesis of (+)-Aphanamol I Based on the Transition Metal Catalyzed [5 + 2] Cycloaddition of Allenes and Vinylcyclopropanes
作者:Paul A. Wender、Lei Zhang
DOI:10.1021/ol006085q
日期:2000.7.1
A concise asymmetric total synthesis of (+)-aphanamol I is described, based on the transition metal catalyzed [5 + 2] allenyl-vinylcyclopropane cycloaddition. The key cycloaddition precursor is convergently assembled from (R)-(+)-limonene and cyclopropane diester through a novel decarboxylative dehydration reaction. The metal-catalyzed [5 + 2] cycloaddition of this precursor proceeds with complete
基于过渡金属催化的[5 + 2]烯基-乙烯基环丙烷环加成反应,简明地描述了(+)-Aphanamol I的简明不对称全合成。关键的环加成前体通过新的脱羧脱水反应由(R)-(+)-柠檬烯和环丙烷二酯聚合组装。该前体的金属催化[5 + 2]环加成反应具有完全的化学,内/外和非对映选择性,产率93%,代表了通向双环[5.3.0]癸烷衍生物的有效一般路线。