Synthetic studies on the compounds related to neocarzinostatin chromophore. 1. Synthesis of the acyclic (E)- and (Z)-dienediyne systems
                                
                                    
                                        作者:Kazuhiko Nakatani、Katsuko Arai、Noriaki Hirayama、Fuyuhiko Matsuda、Shiro Terashima                                    
                                    
                                        DOI:10.1016/s0040-4020(01)88124-2
                                    
                                    
                                        日期:——
                                    
                                    The stereo-defined (E)- and (Z)-dienediyne systems related to neocarzinostatin chromophore (1) could be prepared by the coupling reaction of (E)- and (Z)-enol triflates with optically active acetylynes hearing the correct absolute stereochemistries as found in 1.  Comparison of cytotoxic level of the (E)- and (Z)-dienediyne diols (32 and 33) revealed that the stereochemistry of exo-trisubstituted double bond might have a posibility to control the cytotoxicity of the acyclic analogues related to I.