Asymmetric Direct Vinylogous Michael Additions of Allyl Alkyl Ketones to Maleimides through Dienamine Catalysis
作者:Gu Zhan、Qing He、Xin Yuan、Ying-Chun Chen
DOI:10.1021/ol503017h
日期:2014.11.21
A direct catalytic asymmetric γ-regioselective vinylogous Michael addition of allyl alkyl ketones to maleimides has been developed through dienamine catalysis of a simple chiral 1,2-diphenylethanediamine, giving multifunctional products in excellent enantioselectivity and with high yields. The success of this catalytic strategy relies on the unique inducing effect of deconjugated β,γ-C═C bond, which
通过简单的手性1,2-二苯乙二胺的二烯胺催化作用,已开发出将烯丙基烷基酮直接催化不对称的γ-区域选择性乙烯基类迈克尔基加成到马来酰亚胺上的方法,从而制得具有优异对映选择性和高收率的多功能产品。这种催化策略的成功依赖于β,γ-C═C脱键共轭的独特诱导作用,该作用促进了原本不利的扩展二烯胺类物质的形成。