Chiral Phosphoric Acid Catalyzed Addition of Dihydropyrans to <i>N</i>-Acyl Imines: Stereocontrolled Access to Enantioenriched Spirocyclic Oxazoletetrahydropyrans with Three Contiguous Stereocenters
                                
                                    
                                        作者:Guilong Li、Matthew J. Kaplan、Lukasz Wojtas、Jon C. Antilla                                    
                                    
                                        DOI:10.1021/ol100378t
                                    
                                    
                                        日期:2010.5.7
                                    
                                    Dihydropyran derivatives readily undergo addition to N-acyl imines in the presence of chiral phosphoric acids. This addition process yields an attractive product that is capable of a tandem oxidative-cyclization via an epoxide intermediate.