The First Catalytic, Asymmetric α-Additions of Isocyanides. Lewis-Base-Catalyzed, Enantioselective Passerini-Type Reactions
作者:Scott E. Denmark、Yu Fan
DOI:10.1021/ja035410c
日期:2003.7.1
The first, catalytic, enantioselective alpha-additions of isocyanides to aldehydes have been demonstrated (Passerini-typereactions). The catalytic system of silicon tetrachloride and a chiral bisphosphoramide 5a provided high yields and good to excellent enantioselectivities for the addition of tert-butyl isocyanide to a wide range of aldehydes (aromatic, olefinic, acetylenic, aliphatic). Aqueous