Triethylamine → tert-Butyl ((4aS,5S,7aS)-7a-(5-bromo-2,4-difluorophenyl)-5-(fluoromethyl)-4a,5,7,7a-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-yl)carbamate

Participants

Reaction Conditions

Reaction Steps

(4aS,5S,7aS)-7a-(5-Bromo-2,4-difluorophenyl)-5-(fluoromethyl)-4a,5,7,7a-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-amine (620 mg, 1.63 mmol) was dissolved in THF (10 mL). (BOC)2O (0.45 mL, 1.95 mmol) and Et3N (0.27 mL, 1.95 mmol) were added and the reaction was stirred at 100° C. After 1 hour, the solvents were removed in vacuo. The residue was purified using column chromatography (Biotage SNAP 25 g, 20 mL/min eluting with 20-80% EtOAc in n-hexane) to leave the title compound as a foam. (704 mg). 1H NMR (400 MHz, CDCl3) δ ppm: 7.54 (t, J=1.00 Hz, 1H), 6.86-7.01 (m, 1H), 4.49-4.71 (m, 3H), 4.45 (dd, J=1.22, 8.56 Hz, 1H), 3.68-3.92 (m, 1H), 2.95-3.20 (m, 2H), 2.73 (t, J=1.00 Hz, 1H), 1.46-1.64 (m, 9H)

Provenance & Evidence