名称:
                                Piperonal as Starting Material for the Regiospecific and Stereoselective Synthesis ofEandZIsomers of 3-Methyl-2-hexenedioic acid-1-methyl ester
                             
                            
                                摘要:
                                A short synthesis of gamma-lactone 5 was developed starting from the easily available piperonal 1.  The key step in this approach was an ozonation of the aromatic ring of 2.  Compound 5 led stereoselectively to 6 or 7 by a beta-elimination reaction under thermo-dynamic or kinetic conditions.
                             
                                                            
                                    DOI:
                                    10.1080/00397919108020839