ethyl-6-[1-(3,5-di-t-butyl phenyl)-cyclopropyl]-3-methyl-2,4-hexadienoate   、                                                                                                                                                                                                                                                    在
                                                                                                                                                                                 crude acid                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                                                        以to give 390 mg (60%) of pure (2E, 4E)-6-[1-(3,4-diethylbenzene)-cyclopropyl]-3-methyl-2,4-hexadienoic acid (12)的产率得到(2E, 4E)-6-[(3,5-di-t-butyl phenyl) cyclopropan-1-yl]-3-methyl hexadienoic acid