Dimethylformamide → 4-{6-Amino-7-[(R)-1-(2,6-dichloro-3-fluorophenyl)ethoxy]-furo[3,2-c]pyridin-3-yl}-3,6-dihydro-2H-pyridine-1-carboxamide

Participants

Reaction Steps

A mixture of 7-[(R)-1-(2,6-dichloro-3-fluorophenyl)-ethoxy]-3-(1,2,3,6-tetrahydropyridin-4-yl)-furo[3,2-c]pyridin-6-ylamine (9.00 mg, 0.0213 mmol), trimethylsilyl isocyanate (5.31 μL, 0.0392 mmol), DMF (0.5 mL, 0.005 mol), and DIPEA (0.03 mL, 0.2 mmol) was stirred at rt for 3 h. The solution was taken directly for HPLC purification. The fractions containing the pure product were concentrated in vacuo to afford the title compound as a yellow solid. 1H NMR (CD3OD, 400 MHz): δ=1.85-1.92 (m, 3H), 2.51 (br, s, 2H), 3.60-3.68 (m, 2H), 4.10 (br, s, 2H), 6.27 (d, J=3.5 Hz, 1H), 6.52 (q, J=6.8 Hz, 1H), 7.18-7.27 (m, 1H), 7.36-7.44 (m, 1H), 7.63-7.70 (m, 1H), 8.13-8.17 (m, 1H). MS (ES+): m/z 465.02 [MH+]. HPLC: tR=2.49 min (ZQ2, polar—5 min). The title compound was also converted to its mesylate and maleic acid salts by precipitation from ethanol.

Provenance & Evidence