Under a N2 atmosphere, a solution of of {(1R)-1-benzyl-2-[4-(5-fluoro-2-methoxyphenyl)-1,2,5,6-tetrahydropyridin-1-yl]-ethyl}-methyl-amine (0.17 g, 0.48 mmole described as intermediate 12 above) and triethylamine (0.15 mL, 1.0 mmole) in dichloromethane (10 mL) was cooled to 0° C. 4-Morpholinecarbonyl chloride (0.06 mL, 0.51 mmole) was added and the resulting mixture was stirred at 0° C. to room temperature (ice melt) overnight. The solvent was evaporated to give a brown residue. Flash chromatography (elution with 7:3 EtOAc-hexane) gave 0.17 g (74% yield) of morpholine-4-carboxylic acid {(1R)-1-benzyl-2-[4-(5-fluoro-2-methoxy-phenyl)-1,2,5,6-tetrahydro-4H-pyridin-1-yl]-ethyl}-methyl-amide. An ethanolic solution of the product was heated to gentle reflux and 1 equivalent of fumaric acid in hot ethyl alcohol solution was added to afford the fumarate salt of the titled compound as a white solid.
