Reaction Steps
0.16 M of Osmium tetraoxide in Water (50 uL) was added to (1S,2S,3R,4R)-3-[5-Chloro-2-(1-ethyl-6-methoxy-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b]azepin-7-ylamino)-pyrimidin-4-ylamino]-bicyclo[2.2.1]hept-5-ene-2-carboxylic acid amide (152 mg, 0.306 mmol) and 4-Methyl-morpholine 4-oxide hydrate (65 mg, 0.48 mmol) in Acetone (10 mL) and Water (1.0 mL), and the reaction was stirred under an atmosphere of Nitrogen for 45 min. The reaction was diluted with DCM (15 mL) washed with water (2×5 mL) and brine (10 mL), dried over sodium sulfate and conc. in vacuo. Chromatography of the residue (ISCO 12 g SiO2, 0-10% MeOH:DCM) afforded (1R,2S,3R,4S,5S,6R)-3-[5-Chloro-2-(1-ethyl-6-methoxy-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b]azepin-7-ylamino)-pyrimidin-4-ylamino]-5,6-dihydroxy-bicyclo[2.2.1]heptane-2-carboxylic acid amide as brown solids (110 mg, 67%). MP: 164-170° C.; LCMS: 531 (M+H); 1H-NMR (CDCl3): 8.40 (d, 1H, J=8.8 Hz), 7.92 (s, 1H), 7.38 (s, 1H), 7.16 (d, 1H, J=7.8 Hz), 7.01 (d, 1H, J=9.0 Hz), 5.73 (s, 1H), 5.37 (s, 1H), 4.32 (t, 1H, J=8.0 Hz), 3.97 (m, 1H), 3.83 (m, 1H), 3.80 (s, 3H), 3.49 (d, 1H, J=5.3 Hz), 2.98 (m, 2H), 2.51 (m, 1H), 2.44 (m, 1H), 2.39 (m, 1H), 2.28 (m, 3H), 2.06 (m, 1H), 1.91 (m, 1H), 1.12 (t, 3H, J=7.2 Hz).
