N-{(S)-(5'-tert-butoxycarbonyl-2'-methylphenyl)[(-)-8-phenylmenthyloxycarbonyl]methyl}-N,N-dimethyl-N-[(E)-3-phenylprop-2-en-1-yl]ammonium bromide                                                                                                                                                              在
                                                                                                                                                                                 
potassium tert-butylate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃                                                                                  为溶剂,
                                                                                                                                                    反应 6.0h,
                                                                                                                以69%的产率得到(2R,4E)-2-(5'-tert-butoxycarbonyl-2'-methylphenyl)-2-dimethylamino-5-phenylpent-4-enoic acid (-)-8-phenylmenthol ester