1312991-08-4Relevant articles and documents
Chiral squaramide-catalyzed highly enantioselective michael addition of 2-hydroxy-1,4-naphthoquinones to nitroalkenes
Yang, Wen,Du, Da-Ming
, p. 1241 - 1246 (2011/06/26)
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 route toward the synthesis of chiral functionalized naphthoquinones.