L-丙氨酰Betti碱催化环己酮对硝基烯不对称Michael加成反应  

L-Alaninylated Betti Bases as Catalysts for the Asymmetric Michael Addition Reaction of Cyclohexanone to Nitroolefins

作　　者：焦崇峻[1] 沈宗旋[1] 吴国峰[1] 朱金龙[1] 张雅文[1] 

机构地区：[1]苏州大学化学化工学院江苏省有机合成重点实验室,苏州215123

出　　处：《化学学报》2007年第16期1631-1637,共7页Acta Chimica Sinica

基　　金：江苏省有机合成重点实验室开放课题(No.JSK015)资助项目.

摘　　要：合成了3个手性Betti碱的L-丙氨酰衍生物,并用它们来催化环己酮与硝基烯的Michael加成反应.发现1a是其中最有效的催化剂,ee值最高大于99%,dr值最高大于99∶1.考察了催化剂结构与用量、添加剂用量、底物结构等因素对反应的化学产率和光学收率的影响.　Three N-L-alaninylated Betti bases have been designed and conveniently synthesized and evaluated as organocatalysts for the asymmetric Michael addition of cyclohexanone to nitroolefins.Among them,1a was found to be the most effective and high enantioselectivity up to 〉99% ee and excellent diastereoselectivity up to 〉99∶1 dr have been achieved.The influences of the structure and the loading of the catalyst,the amount of the additive,and the structure of the substrate have also been examined.

关 键 词：MICHAEL加成反应 不对称 Betti碱 硝基烯 

分 类 号：O643.32[理学—物理化学]