PMC:7291971 / 77167-79205 JSONTXT 7 Projects

Annnotations TAB TSV DIC JSON TextAE

Id Subject Object Predicate Lexical cue
T516 0-277 Sentence denotes 4.1.35 9-[(2R,5R)-3-[2-({[(4R,6R)-6-(6-amino-9H-purin-9-yl)-2,2-dimethyl-tetrahydro-2H-furo[3,4-d] [1,3]dioxol-4-yl]methyl}[(4-chloro-3-nitrophenyl)methyl]amino)ethoxy]-4-[(tert-butyldimethylsilyl)oxy]-5-{[(tert-butyldimethylsilyl)oxy]methyl}oxolan-2-yl]-9H-purin-6-amine (35)
T517 278-505 Sentence denotes To a solution of 20 (100 mg, 0.12 mmol, 1.00 eq) in anhydrous DCE (3.5 mL) was added a solution of 4-chloro-3-nitrobenazaldehyde (27 mg, 0.18 mmol, 1.50 eq) in anhydrous DCE (3.5 mL) and acetic acid (10 μL, 0.18 mmol, 1.50 eq).
T518 506-621 Sentence denotes After stirring for 20 min at 40 °C under argon, sodium triacetoxyborohydride (38 mg, 0.18 mmol, 1.50 eq) was added.
T519 622-739 Sentence denotes After stirring at 40 °C for 16 h, the solution was diluted with DCM (30 mL) and washed with saturated aqueous NaHCO3.
T520 740-907 Sentence denotes The aqueous layer was extracted with DCM (3 × 30 mL) and the combined organic extracts were washed with brine (60 mL), dried over Na2SO4 and concentrated under vacuum.
T521 908-1053 Sentence denotes The residue was purified by flash column chromatography (silica gel, linear gradient 0–5% MeOH in DCM) to give 35 as a white solid (105 mg, 87%).
T522 1054-1078 Sentence denotes Rf 0.71 (MeOH/DCM 5:95).
T523 1079-1675 Sentence denotes 1H NMR (500 MHz, CDCl3) δ 8.27 (s, 1H), 8.18 (s, 1H), 8.15 (s, 1H), 7.82 (br. s, 2H), 7.29–7.27 (m, 2H), 6.22 (br. s, 2H), 6.20 (br. s, 2H), 6.10 (d, J = 3.6 Hz, 1H), 5.99 (d, J = 2.1 Hz, 1H), 5.37 (dd, J = 6.5 Hz, J = 2.1 Hz, 1H), 4.91 (dd, J = 6.5 Hz, J = 3.7 Hz, 1H), 4.48 (t, J = 5.1 Hz, 1H), 4.30 (td, J = 6.7 Hz, J = 3.6 Hz, 1H), 4.22 (t, J = 4.2 Hz, 1H), 4.07 (dt, J = 5.8 Hz, J = 3.0 Hz, 1H), 3.99 (dd, J = 11.5 Hz, J = 3.4 Hz, 1H), 3.81–3.72 (m, 2H), 3.71–3.66 (m, 1H), 3.65–3.61 (m, 2H), 2.90–2.70 (m, 4H), 1.57 (s, 3H), 1.36 (s, 3H), 0.92 (s, 9H), 0.86 (s, 9H), 0.14 – - 0.02 (m, 12H).
T524 1676-1959 Sentence denotes 13C NMR (125 MHz, CDCl3) δ 155.8, 155.7, 153.1, 153.0, 149.6, 149.0, 147.8, 140.6, 140.1, 139.3, 133.0, 131.4, 125.6, 125.2, 120.3, 120.1, 114.6, 90.8, 87.0, 85.7, 84.9, 84.0, 83.4, 82.8, 69.6, 69.3, 61.8, 58.2, 56.4, 53.5, 27.2, 26.2, 25.8, 25.4, 18.6, 18.2, −4.5, −4.7, −5.2, −5.3.
T525 1960-2011 Sentence denotes HRMS (ESI+): m/z calcd for C44H66N12O9Si2Cl [M+H]+:
T526 2012-2028 Sentence denotes 997.4297, found:
T527 2029-2038 Sentence denotes 997.4327.