Concise Total Syntheses of the Sesquiterpenoids (−)-Homalomenol A and (−)-Homalomenol B
                                
                                    
                                        作者:Edward Piers、Renata M. Oballa                                    
                                    
                                        DOI:10.1021/jo961605+
                                    
                                    
                                        日期:1996.1.1
                                    
                                    The conjugate additions of the organocopper(I) reagents 22 and 27 to the enantiomerically homogeneous bicyclic enone 4 provided, after epimerization (NaOMe, MeOH) of the resultant product mixtures and appropriate chromatographic separations, the bicyclo[4.3.0]nonan-2-ones 24 and 28. Compounds 24 and 28 were readily converted, via two synthetic steps in each case, into,the sesquiterpenoids (-)-homalomenols B (2) and A (1), respectively.