4.1.32  N-{[(2R,5R)-5-(6-amino-9H-purin-9-yl)-3,4-dihydroxyoxolan-2-yl]methyl}-N-(2-{[(2R,5R)-2-(6-amino-9H-purin-9-yl)-4-hydroxy-5-(hydroxymethyl)oxolan-3-yl]oxy}ethyl)-2-nitro-4-(trifluoromethyl)benzene-1-sulfonamide (12)
Using method C with (120 mg, 0.11 mmol, 1.00 eq) and a 0–40% linear gradient of acetonitrile in TEAAc buffer 50 mM, pH 7 for purification, 12 (18 mg, 20%) was obtained as a white powder with 99% purity determined by HPLC analysis at 260 nm. 1H NMR (500 MHz, DMSO‑d 6) δ 8.47 (d, J = 1.7 Hz, 1H), 8.32 (s, 1H), 8.28 (s, 1H), 8.15 (d, J = 8.3 Hz, 1H), 8.12 (s, 1H), 8.11 (s, 1H), 7.88 (dd, J = 8.6 Hz, J = 1.8 Hz, 1H), 7.36 (br. s, 2H), 7.31 (br. s, 2H), 5.90 (d, J = 5.2 Hz, 1H), 5.82 (d, J = 5.4 Hz, 1H), 5.61 (d, J = 6.0 Hz, 1H), 5.43 (d, J = 5.1 Hz, 1H), 5.38 (dd, J = 6.6 Hz, J = 4.8 Hz, 1H), 5.30 (d, J = 5.3 Hz, 1H), 4.65 (q, J = 5.4 Hz, 1H), 4.37 (t, J = 5.1 Hz, 1H), 4.31 (q, J = 4.7 Hz, 1H), 4.19–4.10 (m, 2H), 3.91 (q, J = 3.6 Hz, 1H), 3.87–3.63 (m, 4H), 3.61–3.45 (m, 4H). 13C NMR (125 MHz, DMSO‑d 6) δ 156.2, 156.1, 152.7, 152.6, 149.2, 148.9, 147.7, 139.9, 139.4, 135.9, 133.9, 133.6, 133.3, 133.1, 131.1, 128.9, 128.9, 152.5, 123.3, 121.1, 119.0, 122.0, 121.9, 119.2 (2C), 87.8, 86.3, 85.9, 81.6, 81.5, 72.5, 71.4, 68.8, 67.7, 61.0, 50.0, 47.3. 19F NMR (378 MHz, DMSO‑d 6): δ −62.8. HRMS (ESI+): m/z calcd for C29H32N12O11SF3 [M+H]+: 813.1986, Found 813.1988.