PMC:7571312 / 67285-68238 JSONTXT 4 Projects

Annnotations TAB TSV DIC JSON TextAE

Id Subject Object Predicate Lexical cue
T415 0-241 Sentence denotes A solution of tert-butyl ((1S)-3-bromo-2-oxo-1-{[(3S)-2-oxopyrrolidin-3-yl]methyl}propyl)carbamate (1.17 g, 3.2 mmol) in DMF (16 mL) was treated with 2,6-dichlorobenzoic acid (794 mg, 4.2 mmol) followed by cesium fluoride (1.18 g, 7.4 mmol).
T416 242-319 Sentence denotes The resulting suspension was placed in a preheated oil bath at 65 °C for 2 h.
T417 320-537 Sentence denotes The reaction was cooled to an ambient temperature, diluted with ethyl acetate (100 mL), washed once with water (40 mL) and with brine (40 mL), dried over MgSO4, filtered, and concentrated to give a crude yellow syrup.
T418 538-687 Sentence denotes This material was purified by Biotage MPLC (25 M, 4.5% methanol/dichloromethane) to afford 1.19 mg (80%) of the title compound as an off-white glass.
T419 688-953 Sentence denotes 1H NMR (400 MHz, DMSO-d6) δ 7.60 (m, 5H), 5.35 (s, 2H), 4.32 (m, 1H), 3.23 (m, 2H), 2.24 (m, 1H), 2.11 (m, 1H), 1.86 (m, 1H), 1.67 (m, 2H), 1.35 (s, 9H); MS (ESI+) for C20H24Cl2N2O6m/z 481.0 (M + Na)+; HRMS (ESI+) calcd for C20H24Cl2N2O6+H 481.0903, found 481.0890.