N,N-dimethyl-N-[(-)-8-phenylmenthoyloxycarbonylmethyl]-N-(4'-trifluoromethylbenzyl)ammonium bromide 在
potassium tert-butylate 作用下,
以
四氢呋喃 为溶剂,
反应 15.0h,
以93%的产率得到(2S)-2-(dimethylamino)-2-(2'-methyl-5'-trifluoromethylphenyl)acetic acid (-)-8-phenylmenthol ester