N-(4'-tert-butoxycarbonylbenzyl)-N,N-dimethyl-N-[(-)-8-phenylmenthoyloxycarbonylmethyl]ammonium bromide 在
potassium tert-butylate 作用下,
以
四氢呋喃 为溶剂,
反应 4.0h,
以95%的产率得到(2S)-2-(5'-tert-butoxycarbonyl-2'-methylphenyl)-2-(dimethylamino)acetic acid (-)-8-phenylmenthol ester