作者:Shira D. Halperin、Robert Britton
DOI:10.1039/c3ob27462d
日期:——
An auxiliary strategy has been developed for asymmetric reactions of aldehydes in which the auxiliary itself is not chiral, but a single chlorine atom introduced via organocatalytic α-chlorination. The stereodirecting influence of the chlorine atom is then exploited prior to its removal by radical reduction. This strategy is demonstrated in the synthesis of several aldols (92–99% ee) and the natural
已经开发了用于醛的不对称反应的辅助策略,其中该辅助剂本身不是手性的,而是通过有机催化α-氯化引入的单个氯原子。然后在通过自由基还原将其除去之前,利用氯原子的立体定向影响。几种羟醛(92-99%ee)和天然产物(+)-dihydroyashabushiketol和(+)-solistatin的合成证明了这一策略。