1,2-Dimethyl-1-[1-[3-(3,4-difluorophenoxy)-propyl]piperidin-4-yl]-3-phenylisothiourea Hydrogen Fumarate 、
碘甲烷 以The S-methylation of 1.5 g (3.58 mmol) of the preceding thiourea 6.1 with 245 μl methyl iodide according to the protocol of example 1.2 gives 615 mg (Yd: 32%) of compound 6 of formula的产率得到1-[1-[3-(3,4-Difluorophenoxy)propyl] piperidin-4-yl]-1-methyl-3-phenylthiourea