Highly Stereoselective Construction of β,β-Diaryl-α-Branched Ketones by the Chiral Primary Amine-Catalyzed Asymmetric Retro-Claisen Reaction
作者:Yanfang Han、Long Zhang、Sanzhong Luo
DOI:10.1021/acs.orglett.2c00435
日期:2022.3.4
Highly diastereo- and enantioselective retro-Claisen reaction of β-diketones with o-quinone methides has been developed by chiral primary amine catalysis. This reaction allows for efficient synthesis of chiral β,β-diaryl-α-branched ketones in moderate to good yields with excellent stereoselectivities. The reaction occurs via a tandem sequence of benzylic C–C bond formation, C–C bond cleavage, and stereospecific
已经通过手性伯胺催化开发了β-二酮与邻醌甲基化物的高度非对映和对映选择性逆克莱森反应。该反应允许以中等至良好的收率有效合成手性 β,β-二芳基-α-支链酮,并具有优异的立体选择性。该反应通过苄基 C-C 键形成、C-C 键断裂和立体定向烯胺质子化的串联顺序发生。该策略使用邻醌甲基化物作为二芳基前体,具有广泛的底物范围、温和的条件和高度的立体控制。