Total Synthesis of (+)-Clavilactone A and (−)-Clavilactone B by Ring-Opening/Ring-Closing Metathesis
                                
                                    
                                        作者:Ken-ichi Takao、Ryuki Nanamiya、Yuuki Fukushima、Ayumi Namba、Keisuke Yoshida、Kin-ichi Tadano                                    
                                    
                                        DOI:10.1021/ol4027842
                                    
                                    
                                        日期:2013.11
                                    
                                    The enantioselective total synthesis of natural enantiomers of clavilactones A and B has been achieved. A key feature of the synthesis is the use of a ring-opening/ring-closing metathesis, which allows the one-pot transformation of a strained cyclobutenecarboxylate into a gamma-butenolide.