methyl (2Z)-1-methylpenta-2,4-dien-1-yl maleate                                                                                                                                                              在
                                                                                                                                                                                 
2,6-二叔丁基-4-甲基苯酚                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 3.0h,
                                                                                                                生成                                                 (+/-)-methyl (3S,3aR,7R,7aS)-3-methyl-1-oxo-3,3a,6,7,7a-hexahydro-7-isobenzofuran carboxylate   、                                                                                             (+/-)-methyl (3S,3aS,7S,7aR)-3-methyl-1-oxo-3,3a,6,7,7a-hexahydro-7-isobenzofuran carboxylate   、                                                                                             1-methyl-3-oxo-1,3,3a,4,5,7a-hexahydro-isobenzofuran-4-carboxylic acid methyl ester   、                                                                                             
1β,3,3aα,4α,5,7aα-hexahydro-1-methyl-3-oxo-4carbomethoxyisobenzofuran