Water → HCID 76577934, compound

Participants

Reaction Steps

To a solution of 33 (1.0 g, 3.77 mmol) in dry pyridine (30 ml) cooled at 0° C., acetyl chloride (0.8 ml, 11.3 mmol) was added dropwise and the mixture was stirred 16 h at room temperature. Water (40 ml) was added and the precipitate was collected by filtration. The crude was purified by flash chromatography (CH2Cl2/acetone/MeOH 8:2:0.5) and triturated with Et2O/CH2Cl2/MeOH, affording 35 (251 mg, 21%) as yellow solid as single isomer. 1H NMR (300 MHz, DMSO d6): δ 8.12 (d, 1H), 7.91 (m, 2H), 7.77 (ddd, 1H), 7.43 (bs, 2H), 2.27 (s, 3H). ESI+MS: calcd for C15H9N5O3: 307.27; found: 308.1 (MH+).

Provenance & Evidence