Asymmetric Mannich Reaction of Malonates with Imines Catalyzed by a Chiral Calcium Complex
                                
                                    
                                        作者:Thomas Poisson、Tetsu Tsubogo、Yasuhiro Yamashita、Shu̅ Kobayashi                                    
                                    
                                        DOI:10.1021/jo902383b
                                    
                                    
                                        日期:2010.2.5
                                    
                                    A chiral calcium complex was found to be effective for the Mannich reactions of malonates with N-Boc imines. The desired adducts were obtained in excellent yields (up to 95%) with moderate to good enantioselectivities (up to 77% ee).