作者:Tatsuo Suzuki、Masaharu Inui、Seijiro Hosokawa、Susumu Kobayashi
DOI:10.1016/s0040-4039(03)00610-5
日期:2003.4
Ketene N,O-acetals were prepared stereoselectively and submitted to a Lewis acid-mediated 1,3-rearrangement to afford C-alkylated products. The reactions proceeded in a stereoselective manner to construct a chiral quaternary carbon in high selectivity. The stereochemistry of the quaternary center was found to be opposite to that obtained by an anionic direct dienolate alkylation.
立体选择性地制备酮N,O-乙缩醛,并使其经受路易斯酸介导的1,3-重排,得到C-烷基化产物。反应以立体选择性方式进行,以高选择性构建手性季碳。发现季中心的立体化学与通过阴离子直接二烯酸酯烷基化获得的立体化学相反。