Towards the synthesis of spongistatin 1: Diastereoselective synthesis of the C(36)–C(45) subunit
                                
                                    
                                        作者:Glenn C. Micalizio、William R. Roush                                    
                                    
                                        DOI:10.1016/s0040-4039(99)00464-5
                                    
                                    
                                        日期:1999.4
                                    
                                    An efficient and highly diastereoselective 12 step synthesis of the C(36)-C(45) subunit (2a) of spongistatin 1 is described. The synthesis features highly diastereoselective alpha-alkoxyallylation reactions using the gamma-alkoxy substituted allylstannanes 5 and 6, and a thermodynamically controlled intramolecular Michael addition to close the pyran, (C) 1999 Elsevier Science Ltd. All rights reserved.