Diastereo- and Enantioselective Synthesis of Fluorinated Proline Derivatives via Copper(I)-Catalyzed Asymmetric 1,3-Dipolar Cycloaddition
作者:Xue-Long Hou、Qing Li、Chang-Hua Ding、Xiao-Hui Li、Walter Weissensteiner
DOI:10.1055/s-0031-1289653
日期:2012.1
asymmetric cycloaddition reaction of fluoromethyl-substituted nitroalkenes with azomethine ylides was developed using a catalyst derived from copper(I) perchlorate and a commercially available, chiral Walphos ligand. This method provides a simple approach to optically active exo-3-(fluoromethyl)proline derivatives in high yields, as well as in high diastereo- and enantioselectivities. 1,3-dipolar cycloaddition
使用衍生自高氯酸铜(I)和市售手性Walphos配体的催化剂,开发了氟甲基取代的硝基烯烃与甲亚胺烷基化物的催化不对称环加成反应。该方法提供了一种简单的方法来以高收率以及高非对映选择性和对映选择性来制备旋光的exo -3-(氟甲基)脯氨酸衍生物。 1,3-偶极环加成-铜-不对称催化-甲亚胺基化物-氟化脯氨酸