Three-Component Coupling Reactions of Silyl Glyoxylates, Vinyl Grignard Reagent, and Nitroalkenes: An Efficient, Highly Diastereoselective Approach to Nitrocyclopentanols
作者:Gregory R. Boyce、Jeffrey S. Johnson
DOI:10.1002/anie.201003470
日期:2010.11.15
easy: A regio‐ and stereoselective three‐component couplingreaction generates functionalized (Z)‐silyl enol ethers through a vinylation/[1,2]‐Brook rearrangement/vinylogous Michael reaction cascade. These adducts can then undergo a diastereoselective deprotection/intramolecular Henry sequence to rapidly assemble densely functionalized nitrocyclopentanols with three contiguous stereocenters (see scheme;
快速简便:区域选择性和立体选择性三组分偶联反应通过乙烯基化/[1,2]-布鲁克重排/乙烯基迈克尔反应级联反应生成官能化的 ( Z )-甲硅烷基烯醇醚。然后,这些加合物可以进行非对映选择性脱保护/分子内亨利序列,以快速组装具有三个连续立体中心的密集官能化硝基环戊醇(参见方案;TES=三乙基甲硅烷基)。