Chiral Bifunctional Thiourea-Catalyzed Enantioselective Michael Addition of Ketones to Nitrodienes
作者:Hai Ma、Kun Liu、Fa-Guang Zhang、Chuan-Le Zhu、Jing Nie、Jun-An Ma
DOI:10.1021/jo901991v
日期:2010.3.5
Simple bifunctional thioureas, derived from the commercially available saccharides and chiral diamines, have been shown tunably to promote Michael-type addition of ketones to α,β−γ,δ-nitrodienes. The Michael adducts were obtained in good yields albeit with high enantioselectivites (84−99% ee). Furthermore, these products can be readily transformed into more useful molecules.