Chiral Squaramide-Catalyzed Highly Enantioselective Michael Addition of 2-Hydroxy-1,4-naphthoquinones to Nitroalkenes
作者:Wen Yang、Da-Ming Du
DOI:10.1002/adsc.201000981
日期:2011.5
A chiral squaramide‐organocatalyzed, highly enantioselective Michael addition of 2‐hydroxy‐1,4‐naphthoquinones to nitroalkenes has been developed. This reaction afforded the chiral naphthoquinones in excellent yields (up to 99%) and excellent enantioselectivity (up to 98% ee) under very low catalyst loading (0.25 mol%). This organocatalytic asymmetric Michael addition provides an efficient alternative
已开发了一种手性方酰胺-有机催化的2-羟基-1,4-萘醌对映体高对映体选择性迈克尔加成到硝基烯烃上的方法。该反应在非常低的催化剂负载量(0.25mol%)下以优异的产率(高达99%)和优异的对映选择性(高达98%ee)提供了手性萘醌。这种有机催化的不对称迈克尔加成为合成手性官能化萘醌提供了一条有效的替代途径。