Dimethylformamide → (S)-5-(((4-(Trifluoromethyl)phenyl)(3-(trifluoromethyl)-pyridin-2-yl)methyl)carbamoyl)picolinic Acid 2,2,2-trifluoroacetate

Participants

Reaction Steps

To a solution of 6-(methoxycarbonyl)nicotinic acid (58.4 mg, 0.322 mmol) and DIPEA (0.20 mL, 1.148 mmol) in DMF (2 mL) were added HATU (178 mg, 0.468 mmol) and (S)-(4-(trifluoromethyl)phenyl)(3-(trifluoromethyl)pyridin-2-yl)-methanamine hydrochloride (Intermediate 1) (100 mg, 0.312 mmol). The solution was stirred at rt for 2 h. The solution was then diluted with THF (10 mL), MeOH (3 mL), and 1M LiOH (2 mL). After a further 16 h, the reaction was concentrated in vacuo, taken up in a minimum of DMF and purified by reverse-phase preparative HPLC (Shimadzu) on a Phenomenex Gemini™ column (5 micron, C18, 110 Å, Axia, 100×30 mm) eluting at 45 mL/min with a linear gradient of 20% to 90% MeCN (0.1% TFA) in H2O (0.1% TFA) over 10 minutes to the title compound as a yellow solid. 1H NMR (CDCl3, 300 MHz) δ ppm 9.14 (s, 1H), 8.94 (d, J=4.4 Hz, 1H), 8.64 (d, J=7.2 Hz, 1H), 8.41 (d, J=8.0 Hz, 1H), 8.25 (d, J=7.9 Hz, 1H), 8.13 (d, J=7.9 Hz, 1H), 7.46-7.63 (m, 5H), 6.88 (d, J=7.0 Hz, 1H). MS (ESI pos. ion) m/z: 469.9 (M+H).

Provenance & Evidence