The enantioselective synthesis of acyclic pyrrole, indole and other N-carbazole carbinols via ligand-mediated addition of lithium carbazolates to aldehydes, together with studies into their catalytic enantioselective synthesis using substoichiometric base and ligand, are reported. The subsequent exploitation of the resulting stereocentre as a controlling element in 1,3-syn- and anti-selective reduction of β-ketones and elaboration to homoallylic alcohols is also described.
报告了通过
配体介导的
锂碳
杂环化合物与醛的加成反应,合成无环
吡咯、
吲哚及其他氮-碳杂
环醇的对映体选择性合成,同时还研究了使用亚当量碱和
配体进行催化对映体选择性合成的情况。此外,还描述了利用生成的立体中心作为控制因素,进行β-酮的1,3-syn-和anti-选择性还原及向同类烯醇的衍生化过程。