(2S)-2-(5'-tert-butoxycarbonyl-2'-methylphenyl)-2-(dimethylamino)acetic acid (-)-8-phenylmenthol ester 、
3-溴-2-甲基丙烯 以
乙腈 为溶剂,
以85%的产率得到N-{(S)-(5'-tert-butoxycarbonyl-2'-methylphenyl)[(-)-8-phenylmenthyloxycarbonyl]methyl}-N,N-dimethyl-N-(2-methylprop-2-en-1-yl)ammonium bromide