[4-(3,4-dichloro-benzoylamino)-benzyl]-dimethyl-(tetrahydro-pyran-4-yl)-ammonium iodide 在
anion-exchange resin (Bio-Rad, analytical grade anion exchange resin. AG 1-X
8, 50-100 mesh, chloride form) 作用下,
以
甲醇 、
水 为溶剂,
以95%的产率得到N-[4-(3,4-dichlorobenzamido)benzyl]-N,N-dimethyl-N-(tetrahydropyran-4-yl)ammonium chloride