Total Synthesis of Auripyrone A Using a Tandem Non-Aldol Aldol/Paterson Aldol Process as a Key Step
作者:Michael E. Jung、Ramin Salehi-Rad
DOI:10.1002/anie.200904607
日期:2009.11.2
To aldol or non‐aldol: The titled reaction sequence generates the polypropionate 3 from the epoxy alcohol 1 and the ketone 2 as a single diastereomer. Compound 2 was used for an efficient synthesis of auripyrone A using a highly regioselective hemiketalization of a keto diol and a late‐stage spiroketalization onto a stable hemiketal as the final key steps. TBDPS=tert‐butyldiphenylsilyl, Bz=benzoyl
To aldol or non-aldol:标题反应序列从环氧醇1和酮2生成聚丙酸酯3作为单一的非对映异构体。化合物2用于有效合成 auripyrone A,使用高度区域选择性的酮二醇半缩酮化和后期螺缩酮化到稳定的半缩酮作为最后的关键步骤。TBDPS=叔丁基二苯基甲硅烷基,Bz=苯甲酰基,TES=三乙基甲硅烷基。