Triethylamine → 2-fluoro-N-(thiazolo[4,5-c]pyridin-2-yl)-5-(trifluoromethyl)benzamide

関与物質

反応手順

A mixture of thiazolo[4,5-c]pyridin-2-amine (Milestone Pharm Tech USA Inc.) (1.35 g, 8.93 mmol), 2-fluoro-5-(trifluoromethyl)benzoic acid (2.23 g, 10.72 mmol) and triethylamine (2.71 g, 26.8 mmol) in THF (30 mL) was treated dropwise with 1-propanephosphonic acid cyclic anhydride (50% in ethyl acetate) (6.82 g, 10.72 mmol). The mixture was stirred at room temperature for 12 hrs. The reaction mixture was diluted with EtOAc, and washed with saturated NaHCO3. The organic layer was dried (Na2SO4), filtered, and concentrated. The residue was triturated with Et2O and hexane to afford the title compound (2.2 g, 72%) as a brown solid. 1H NMR (500 MHz, DMSO-d6) δ ppm 7.66 (t, J=9.46 Hz, 1H) 8.07 (m, 1H) 8.12 (d, J=4.88 Hz, 1H) 8.26 (dd, J=6.10, 2.14 Hz, 1H) 8.44 (d, J=5.49 Hz, 1H) 9.07 (s, 1H); MS (DCI/NH3) m/z 342 (M+H)+.

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