反应详情

N-[(4aR,6R,8aS)-6-(Difluoromethyl)-8a-(2,4-difluorophenyl)-4,4a,5,6,8,8a-hexahydropyrano[3,4-d][1,3]thiazin-2-yl]benzamide (C24) was deprotected using the method described for conversion of N-[(4R,4aR,6R,8aS)-8a-(2,4-difluorophenyl)-6-(fluoromethyl)-4-methyl-4,4a,5,6,8,8a-hexahydropyrano[3,4-d][1,3]thiazin-2-yl]benzamide (C19) to (4R,4aR,6R,8aS)-8a-(2,4-difluorophenyl)-6-(fluoromethyl)-4-methyl-4,4a,5,6,8,8a-hexahydropyrano[3,4-d][1,3]thiazin-2-amine (1) in Example 1; the product was isolated as a white solid. Yield: 1.46 g, 4.36 mmol, 96%. LCMS m/z 335.1 [M+H+]. 1H NMR (400 MHz, CD3OD) δ 7.35 (ddd, J=9, 9, 7 Hz, 1H), 6.93-7.01 (m, 2H), 5.77 (td, J=55.6, 3.9 Hz, 1H), 4.11 (dd, J=11.1, 2.0 Hz, 1H), 3.81-3.92 (m, 1H), 3.73 (d, J=11.0 Hz, 1H), 2.87-2.97 (m, 2H), 2.69-2.75 (m, 1H), 1.88-1.99 (m, 1H), 1.59-1.66 (m, 1H).

1. customthe product was isolated as a white solid