5-[(4aR,6R,8aS)-2-amino-6-[(benzyloxy)methyl]-4,4a,5,6-tetrahydropyrano[3,4-d][1,3]thiazin-8a(8H)-yl]-2,4-difluorobenzonitrile → 5-[(4aR,6R,8aS)-2-amino-6-(fluoromethyl)-4,4a,5,6-tetrahydropyrano[3,4-d][1,3]thiazin-8a(8H)-yl]-2,4-difluorobenzonitrile

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Reaction Steps

N-[(4aR,6R,8aS)-8a-(5-Cyano-2,4-difluorophenyl)-6-(fluoromethyl)-4,4a,5,6,8,8a-hexahydropyrano[3,4-d][1,3]thiazin-2-yl]benzamide (C14) was converted to the product using the method described for the synthesis of 5-[(4aR,6R,8aS)-2-amino-6-[(benzyloxy)methyl]-4,4a,5,6-tetrahydropyrano[3,4-d][1,3]thiazin-8a(8H)-yl]-2,4-difluorobenzonitrile (2) in Example 2. Yield: 67.0 mg, 0.197 mmol, 88%. LCMS m/z 342.2 [M+H+]. 1H NMR (400 MHz, CD3OD), δ 7.64 (t, J=7.9 Hz, 1H), 7.31 (dd, J=12.1, 9.2 Hz, 1H), 4.41-4.48 (m, 1H), 4.29-4.36 (m, 1H), 4.04 (dd, J=11, 2.4 Hz, 1H), 3.83-3.93 (m, 1H), 3.69 (d, J=11.1 Hz, 1H), 2.86-2.97 (m, 2H), 2.69-2.73 (m, 1H), 1.82 (qd, J=12.4, 2.7 Hz, 1H), 1.52 (ddd, J=13.2, 4.2, 2.5 Hz, 1H).

Provenance & Evidence