To a pre-cooled to 0 °C solution of the corresponding piperidine (1.00 mmol) and NEt3 (1.20 mmol for bases or 2.20 mmol for hydrochlorides) in CH2Cl2 (5 mL) pure benzoyl chloride (0.11 mL, 0.95 mmol) was added in a dropwise manner. Resulted mixture was stirred at rt overnight, then diluted with sat aq NaHCO3 (15 mL) and CH2Cl2 (10mL). The layers were separated, organic solution was washed with sat aq NaHCO3 (3  10 mL), 10% aq NaHSO4 (3  10 mL), dried over anhydrous Na2SO4 and concentrated in vacuo to afford crude product, which was triturated with minimum amounts of hexanes to afford analytically pure amide.