Acetic Anhydride → HCID 24821339, compound

Participants

Reaction Steps

To a solution of Example 11D ((110 mg, 0.337 mmol) and diisopropylethylamine (0.5 mL) in methylene chloride (1 mL) cooled to 0° C. was added acetic anhydride (100 μL, 1.06 mmol, 3.1 eq.). The mixture was stirred at room temperature overnight. The reaction mixture was purified directly on silica gel eluting with ethyl acetate:hexane gradient (0-80%) to give the title compound (109 mg, 88%). 1H NMR (300 MHz, DMSO-d6) δ ppm 8.30 (d, J=8.09 Hz, 1 H), 7.66 (s, 1 H), 7.45-7.54 (m, 2 H), 7.33-7.40 (m, 2 H), 7.27-7.32 (m, Hz, 2 H), 6.99-7.10 (m, 2 H), 4.77-4.96 (m, 1 H), 3.79 (s, 3 H), 1.83 (s, 3 H), 1.32 (d, J=6.99 Hz, 3 H); MS (DCl) m/e 369 (M+H).

Provenance & Evidence