名称:
                                Asymmetric synthesis of alpha-halo esters
                             
                            
                                摘要:
                                The reaction of (R)-Pantolactone with alpha-halogenated ketenes has been found to proceed with good to excellent diastereoselectivities (de 75 to > 95%). The (R)-Pantolacto chiral auxiliary induced the (S)-configuration at the new chiral center in most cases.
                             
                                                            
                                    DOI:
                                    10.1016/s0040-4039(00)61779-3