Triethylamine → HCID 57485438, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 2-bromo-4-trifluoromethyloxazole-5-carbonyl chloride (A-39) (0.34 g, 1.2 mmol) and 1-(5-aminopyridin-2-yl)-4-phenylpiperidine (B-6) (0.25 g, 1.0 mmol) in CH2Cl2 (10 mL) was cooled to −78° C. then triethyl amine (0.16 mL, 1.2 mmol) was added. The reaction mixture was stirred for 2 h while the temperature was warmed slowly up to 0° C. The solvent was concentrated, and the residue was purified by chromatography on a silica-gel column (eluant: 0-50% EtOAc/hexane gradient) to yield 1-(5-(2-bromo-4-(trifluoromethyl)oxazole-5-carboxamido)pyridin-2-yl)-4-phenylpiperidine (A-40) (0.19 g, 35% yield) as a yellow solid. Note: the product A-40 contains compound with the bromine atom exchanged for a chlorine atom. 1H NMR (500 MHz, CDCl3) δ 9.58 (br s, 1H), 8.59 (br s, 1H), 8.34 (dd, 1H, J=9.5, 1.8 Hz), 7.35 (m, 2H), 7.30-7.22 (m, 3H), 6.89 (d, 1H, J=9.4 Hz), 4.42 (d, 2H, J=13.3 Hz), 3.17 (t, 2H, J=12.7 Hz), 2.85 (m, 1H), 2.05 (m, 2H), 1.84 (m, 2H); LCMS (ESI) calcd for [M+1]+ for chloride 451.1. found 451.4.

Provenance & Evidence