Organocatalytic asymmetric Michael addition of ethyl nitroacetate to enones using natural amino acids-derived C1-symmetric chiral primary–secondary diamines
作者:Yirong Zhou、Qiang Liu、Yuefa Gong
DOI:10.1016/j.tetlet.2013.04.005
日期:2013.6
A highly organocatalytic asymmetric Michael addition of ethyl nitroacetate to enones by using C1-symmetric chiral primary–secondary diamines has been developed. In assistance of o-nitrobenzoic acid, chiral amine 1f which was derived from l-tryptophane and d-camphor can effectively promote the transformation in high yields (up to 96%) and enantioselectivities (up to 95%) under mild conditions.
通过使用C 1-对称的手性伯-仲二胺,已开发出高度有机催化的不对称迈克尔·硝基乙酸乙酯加成至烯酮的方法。在邻硝基苯甲酸的辅助下,衍生自l-色氨酸和d-樟脑的手性胺1f可以在温和条件下以高收率(最高96%)和对映选择性(最高95%)有效地促进转化。