5-Amino-2-fluoropyridine → HCID 57986920, compound

Participants

Reaction Steps

5-amino-2-fluoropyridine (0.476 g, 4.2 mmol) was added to 4-(4-Formyl-thiazol-2-yl)-piperidine-1-carboxylic acid tert-butyl ester (0.84 g, 2.8 mmol) in dry DCM (10 mL). Sodium triacetoxyborohydride (0.9g, 4.2 mmol) was then added. The reaction was stirred for 3 hours at room temperature under N2. The organic layer was washed with 2M NaOH solution, water, brine, dried (MgSO4), and the solvent was removed in vacuo. The material was purified by silica gel chromatography (DCM/methanol: 10:1 v/v) to give the desired product. 1H NMR (CDCl3): δ 7.59-7.60 (1H, m), 7.06-7.10 (1H, m), 7.02 (1H, s), 6.76 (1H, dd, J=8.8, 3,6 Hz), 4.4 (2H, d), 4.20-4.31 (3H, m), 3.09-3.17 (1H, m), 2.8-2.95 (2H, m), 2.07-2.10 (2H, m), 1.77-1.47, (2H, m), 1.47 (9H, s).

Provenance & Evidence