Prolylprolinol-Catalyzed Asymmetric Michael Addition of Aliphatic Aldehydes to Nitroalkenes
作者:Dengfu Lu、Yuefa Gong、Weizhou Wang
DOI:10.1002/adsc.200900687
日期:2010.3.8
Several novel prolylprolinol catalysts have been designed and synthesized. This type of compound showed high catalytic efficiency on promoting the direct addition of unmodified aldehydes to nitroalkenes. Among the catalysts surveyed, the least bulky member (8d) exhibited the best performance on both efficiency and stereoselectivity, providing the products with up to 97% ee value with 1.5–5 mol% catalyst
已经设计和合成了几种新型的脯氨酰脯氨醇催化剂。这种类型的化合物在促进未改性的醛直接添加到硝基烯烃方面显示出高催化效率。在所调查的催化剂中,最小体积的成员(8d)在效率和立体选择性方面均表现出最佳性能,在1.5-5 mol%的催化剂负载量下,提供的产品具有高达97%ee的ee值。此外,已经进行了过渡态的计算研究,以解释高非对映选择性和对映选择性。