Tetrahydrofuran → HCID 86666505, compound

Participants

Reaction Steps

Tert-butyl 4-hydroxypiperidine-1-carboxylate (0.37 g, 1.8 mmol, Aldrich) was added to sodium hydride (74 mg, 1.8 mmol, 60% in mineral oil) in tetrahydrofuran (2.1 mL). After stirring for 45 minutes, 2-chloro-6-(trifluoromethyl)isonicotinonitrile (0.24 g, 0.93 mmol, from Step A) in tetrahydrofuran (1.3 mL) was introduced. After stirring overnight, the mixture was diluted with water and extracted with EtOAc. The combined extracts were washed with water, brine, dried over sodium sulfate, filtered and concentrated. Flash chromatography, eluting with a gradient from 0-40% EtOAc in hexanes afforded product (0.20 g, 44%). 1H NMR (300 MHz, CDCl3) δ 7.58 (d, J=1.2 Hz, 1H), 7.23 (dd, J=1.3, 0.6 Hz, 1H), 6.15 (s, 1H), 5.75 (s, 1H), 5.30 (tt, J=1.1, 3.8 Hz, 1H), 3.95-3.62 (m, 4H), 3.33 (ddd, J=13.5, 8.4, 3.7 Hz, 2H), 3.02 (ddd, J=13.3, 9.8, 3.4 Hz, 2H), 1.58 (s, 9H); 19F NMR (282 MHz, CDCl3) 5-68.97 (s); LCMS (M+Na)+: 412.0.

Provenance & Evidence