Enantioselective synthesis of pantolactone analogues from an ephedrine-derived morpholine-dione
                                
                                    
                                        作者:Sunil V Pansare、Annyt Bhattacharyya                                    
                                    
                                        DOI:10.1016/s0040-4020(03)00408-3
                                    
                                    
                                        日期:2003.4
                                    
                                    An efficient enantioselective synthesis of beta,beta-dialkyl alpha-hydroxy gamma-butyrolactones, analogues of pantolactone, has been developed employing a stereoselective Prins reaction of chiral alkylidene morpholinones, as the key step. Enantioselective synthesis of a naturally occurring pantolactone homologue and a spiro analogue of pantolactone was achieved with this protocol. (C) 2003 Elsevier Science Ltd. All rights reserved.