Pyridine → HCID 69598145, compound

Participants

Reaction Steps

A solution of 1-F (0.76 g, 1.8 mmol), Boc2O (0.52 g, 2.4 mmol), pyridine (99 μL, 1.3 mmol), and NH4CO3H (0.22 g, 2.8 mmol) in dioxane (4 mL) and DMF (1 mL) was stirred at 25° C. for 12 h. The reaction mixture was diluted with EtOAc (100 mL) and washed with 0.1 N HCl (2×20 mL), saturated NaHCO3 (2×20 mL), and brine (20 mL), dried with Na2SO4, filtered, and concentrated to give a crude residue which was purified using flash column chromatography (100% CH2Cl2→10% MeOH/CH2Cl2) to yield 1-G as a brown-red solid (0.76 g, 100%). 1H NMR (400 MHz, CDCl3): δ 7.41 (d, J=8.2 Hz, 2H), 7.30 (d, J=8.2 Hz, 2H), 6.38 (s, 1H), 6.01 (br s, 1H), 5.45 (br s, 1H), 5.15–5.10 (m, 1H), 4.50–4.38 (m, 1H), 3.15 (dd, J=13.9, 6.8 Hz, 1H), 3.08 (dd, J=13.5, 6.5 Hz, 1H), 1.68 (s, 9H), 1.41 (s, 9H); LCMS found for C21H30N3O4S (M+H)+: m/z=420.

Provenance & Evidence