Triethylamine → 2,4,6-Trifluoro-N-ethyl-N-[6-(1-methyl-piperidin-4-yloxy)-pyridin-2-yl]-benzamide

関与物質

反応条件

反応手順

Dissolve ethyl-[6-(1-methyl-piperidin-4-yloxy)-pyridin-2-yl]-amine (preparation 74, 110 mg, 0.47 mmol) in THF (6 mL), add triethylamine (95 mg, 0.94 mmol) and 2,4,6-trifluorobenzoyl chloride (136 mg, 0.70 mmol) sequentially, heat at 55° C. overnight. Quench the reaction with 0.1N NaOH, extract with methylene dichloride three times. Combine the organic layers, dry over Na2SO4, filter and concentrate to give a residue. Chromatography (silica gel) eluting with 3.5% 2M NH3-methanol in methylene dichloride provides 151 mg (82%) of the title compound as an oil: mass spectrum (ion spray): m/z=394.1 (M+1); 1H NMR (CDCl3, ppm): 7.43 (t, 1H), 6.52 (m, 4H), 4.82 (m, 1H), 4.03 (q, 2H), 2.73 (m, 2H), 2.33 (s, 3H), 2.26 (m, 2H), 1.95 (m, 2H), 1.75 (m, 2H), 1.31 (t, 3H). Mono-hydrochloride salt: Anal calcd for C20H22F3N3O2.HCl.H2O: C, 53.63; H, 5.63; N, 9.38. Found: C, 53.66; H, 5.12; N, 9.29.

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