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。
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。
Total Synthesis of Auripyrone B Using a Non-Aldol Aldol−Cuprate Opening Process
作者:Michael E. Jung、Manon Chaumontet、Ramin Salehi-Rad
DOI:10.1021/ol100985n
日期:2010.6.18
aldol reaction of 8 with 9 gives the aldol product 7 in high yield and excellent diastereoselectivity, due to double stereodifferentiation. This compound was used for an efficient synthesis of the natural product auripyrone B 2 in only 20 steps and 8% overall yield from 14 using a late-stage spiroketalization onto a stable hemiketal as the final key step.
非羟醛羟醛-铜酸酯开环通过八个步骤从环氧醚14生成聚丙酸酯11作为单一非对映异构体。由于双立体分化,8与9的高度立体选择性羟醛反应以高产率和优异的非对映选择性产生羟醛产物7 。该化合物用于有效合成天然产物 auripyrone B 2,仅需要 20 个步骤,并且使用后期螺缩酮化为稳定的半缩酮作为最后的关键步骤,14的总产率为 8%。
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。