The first enantioselective intramolecular aminocarbonylation of alkenes promoted by Pd(II)-spiro bis(isoxazoline) catalyst
作者:Toshio Shinohara、Midori A. Arai、Kazuhiko Wakita、Takayoshi Arai、Hiroaki Sasai
DOI:10.1016/s0040-4039(02)02650-3
日期:2003.1
acceleration effect of spiro bis(isoxazoline) ligand (SPRIX) on the Pd(II)-catalyzed intramolecular aminocarbonylation of alkenyl amine derivatives was realized. Furthermore, the chiral Pd(II)–SPRIX catalyst accomplished the first enantioselective intramolecular aminocarbonylation. The reaction of N-(2,2-dimethyl-pent-4-enyl)-p-toluenesulfonamide in the presence of Pd(II)–SPRIX catalyst and p-benzoquinone in
Enantioselective Palladium-Catalyzed Diamination of Alkenes Using <i>N</i>-Fluorobenzenesulfonimide
作者:Erica L. Ingalls、Paul A. Sibbald、Werner Kaminsky、Forrest E. Michael
DOI:10.1021/ja4043406
日期:2013.6.19
An enantioselective Pd-catalyzed vicinal diamination of unactivated alkenes using N-fluorobenzenesulfonimide as both an oxidant and a source of nitrogen is reported. The use of Ph-pybox and Ph-quinox ligands afforded differentially protected vicinal diamines in good yields with high enantioselectivities. Mechanistic experiments revealed that the high enantioselectivity arises from selective formation