Triethylamine → HCID 12985692、化合物

To a mixture of 4.75 g (0.015 mol) of 1-(1-benzyl-4-piperidylacetyl)-4-hydroxypiperidine [1], 51 g of toluene, 1.68 g (0.017 mol) of triethylamine, 1.87 g (0.016 mol) of mesyl chloride was added dropwise at a temperature in the range of 0 to 10° C. and the reaction was allowed to proceed for 2 hours at the temperature in the range. Thereafter, the reaction mixture was washed with an aqueous solution of sodium hydrogencarbonate and an aqueous solution of sodium chloride. The resultant organic layer was dried with anhydrous magnesium sulfate and concentrated under a reduced pressure. To the concentrated residue, 7 g of 2-propanol and 43 g of diisopropyl ether were added and the temperature of the mixture was increased. The mixture was stirred for 0.3 hours at a reflux temperature of 66° C. Thereafter the mixture was cooled to room temperature and subjected to filtration. The resultant wet crystal was dried under a reduced pressure, whereby 5.01 g of the title compound in the state of white powder was obtained (the yield was 84.7%).