Controlling influences in bisspiroketal formation: synthesis of the ABC ring system of azaspiracid
                                
                                    
                                        作者:Rich G Carter、T.Campbell Bourland、Xiao-Ti Zhou、Melissa A Gronemeyer                                    
                                    
                                        DOI:10.1016/j.tet.2003.03.003
                                    
                                    
                                        日期:2003.11
                                    
                                    Substitution effects on the stereochemical outcome of bisspiroketalization on the C-1-C-17 carbon backbone of azaspiracid is presented. A possible explanation is offered to explain the observed stereochemical outcome. (C) 2003 Elsevier Ltd. All rights reserved.