Total Synthesis of (+)-Acanthodoral by the Use of a Pd-Catalyzed Metal-ene Reaction and a Nonreductive 5-<i>e</i><i>xo</i>-Acyl Radical Cyclization
作者:Liming Zhang、Masato Koreeda
DOI:10.1021/ol0363063
日期:2004.2.1
[reaction: see text] The first total synthesis of the antibiotic acanthodoral (1) has been achieved from 3-methyl-2-cyclohexen-1-one in 19 steps in 2.1% overall yield. The synthesis features the use of a Pd-ene reaction in the presence of CO to form the endocyclic alkene 8, a nonreductive acyl radical cyclization reaction, and a ring contraction reaction by the Wolff rearrangement. (+)-Acanthodoral
[反应:见正文]抗生素Acanthodoral(1)的第一个全合成反应是由3-甲基-2-环己烯-1-酮分19个步骤完成的,总产率为2.1%。该合成的特征在于在CO存在下使用Pd-烯反应形成环内烯烃8,非还原性酰基自由基环化反应和通过Wolff重排的环收缩反应。还从(+)-S-2,2-二甲基-6-亚甲基环己烷羧酸开始合成了(+)-棘棘醛。