Chloromethyl chloroformate → (2R,3R)-3-[4-(4-cyanophenyl)thiazol-2-yl]-2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)-2-[[chloromethoxy]carbonyloxy]butane

Participants

Reaction Steps

(2R,3R)-3-[4-(4-Cyanophenyl)thiazol-2-yl]-2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol (5.8 mmol) was added to a suspension of potassium hydride (7 mmol) in THF at 0° C. and was allowed to stir for 0.5 hours. Choromethyl chloroformate (5.8 mmol, in 2 mL THF) was added dropwise and the reaction was allowed to warm to room temperature and stirred for 4 hours. The crude reaction was diluted with EtOAc, and was sequentially washed with H2O, 0.1N HCl, H2O, and brine. The organic layer was dried over MgSO4 and was concentrated to afford 3.43 g of the subtitled product as a pale yellow solid. 1H NMR (DMSO) δ 8.47 (s, 1H), 8.29 (s, 1H), 8.08 (s, 1H), 7.97 (d, 2H, J=8), 7.88 (d, 2H, J=8), 7.26-7.12 (m, 3H), 5.93 (d, 1H, J=6), 5.90 (d, 1H), J=6), 5.70 (d, J=1H, J=15), 5.36 (d, 1H, J=15), 4.02 (q, 1H, J=7), and 1.48 (d, 3H, J=7); MS (MH+=530).

Provenance & Evidence