PMC:7291971 / 67484-68667 JSONTXT

{"target":"https://pubannotation.org/docs/sourcedb/PMC/sourceid/7291971","sourcedb":"PMC","sourceid":"7291971","source_url":"https://www.ncbi.nlm.nih.gov/pmc/7291971","text":"Following method B with 28 (77 mg, 0.14 mmol, 1.00 eq), 32 (68 mg, 46%) was obtained as a pale white solid. Rf 0.47 (10:90 MeOH/DCM). 1H NMR (500 MHz, CDCl3) δ 8.33 (s, 1H), 8.30 (s, 1H), 8.15 (s, 1H), 7.85 (d, J = 8.2 Hz, 1H), 7.77 (d, J = 1.7 Hz, 1H), 7.76 (s, 1H), 7.54 (dd, J = 8.4 Hz, J = 1.8 Hz, 1H), 5.97 (d, J = 2.8 Hz, 1H), 5.93 (d, J = 1.9 Hz, 1H), 5.74 (br. s, 4H), 5.33 (dd, J = 6.4 Hz, J = 2.0 Hz, 1H), 5.01 (dd, J = 6.4 Hz, J = 3.8 Hz, 1H), 4.50 (dd, J = 6.4 Hz, J = 4.6 Hz, 1H), 4.43 (dt, J = 8.3 Hz, J = 4.0 Hz, 1H), 4.18 (dd, J = 4.7 Hz, J = 2.8 Hz, 1H), 4.01–3.96 (m, 2H), 3.94–3.78 (m, 4H), 3.77–3.66 (m, 2H), 3.56 (dt, J = 15.5 Hz, J = 5.1 Hz, 1H), 1.55 (s, 3H), 1.34 (s, 3H), 0.91 (s, 9H), 0.89 (s, 9H), 0.13–0.02 (m, 12H). 13C NMR (125 MHz, CDCl3) δ 155.6, 155.4, 153.3, 153.0, 149.5, 149.1, 147.9, 140.2, 139.5, 137.4, 135.6, 135.3, 135.0, 134.7, 132.0, 128.3, 128.3, 125.3, 123.2, 121.0, 118.8, 121.7, 121.6, 133.0, 120.4, 120.3, 116.2, 114.8, 109.9, 90.6, 87.5, 84.7, 84.3, 84.1, 82.9, 82.6, 69.6, 69.4, 61.3, 50.2, 47.4, 27.2, 26.2, 25.9, 25.4, 18.6, 18.2, −4.4, −4.8, −5.3. HRMS (ESI+): m/z calcd for C44H64N12O11SF3Si2 [M+H]+: 1081.4029, found: 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