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