作者:Danilo Pereira de Sant’Ana、Celso de Oliveira Rezende Júnior、Jean-Marc Campagne、Luiz Carlos Dias、Renata Marcia de Figueiredo
DOI:10.1021/acs.joc.9b01712
日期:2019.10.4
The studies culminating in the synthesis of two large subunits of tautomycetin are described. The first one, fragment C1-C12 that has an anti-1,3-dimethyl system and a terminal diene unit, was accomplished in 10 linear steps in 7.4% overall yield. The second one, fragment C13-C25 which bears the sensitive anhydride framework and the majority of the stereogenic centers, was prepared in 13 linear steps
描述了最终合成互变霉素的两个大亚基的研究。第一个片段,具有抗1,3-二甲基系统和末端二烯单元的片段C1-C12,以10个线性步骤完成,总收率为7.4%。第二个片段C13-C25片段带有敏感的酸酐骨架和大多数立体异构中心,是通过13个线性步骤(最长的序列)以8%的总收率制备的。在所使用的关键转化中,可以列举出区域选择性的环氧化物开环,Pd催化的末端炔与受体炔的加成,Mukaiyama羟醛反应,Yamaguchi酯化和自制的温和二酯化。选择的策略可以为几种重要的中间体提供良好的收率,立体选择性,重现性和可扩展性。