To a solution of the (7-bromo-1,2,3,4-tetrahydro-naphthalen-2-yl)-piperidin-4-yl-propyl-amine (200 μL of 0.25 M in dichloromethane, 50 μmol) was added 220 μL of 0.25 M solution of morpholine 4-carbonyl chloride in dichloromethane and 30 μL of DIEA. The reaction was stirred at 25° C. for 24 h. Concentrated in vacuo. The final product was isolated by preparative RPHPLC (YMC Combiprep ODS-A column, 10-90% acetonitrile: water (0.1% TFA)) to afford {4-[(7-bromo-1,2,3,4-tetrahydro-naphthalen-2-yl)-propyl-amino]-piperidin-1-yl}-pyrrolidin-1-yl-methanone 34 (4.6 mg), [M+H]+=562.
