反应详情

Prepared according to Procedure B with 1h (500 mg, 1.78 mmol) and chloroacetyl chloride (0.49 mL, 6.13 mmol) in acetic acid (10 mL). Purified by extraction from aqueous K2CO3, followed by recrystallization from isopropanol to afford 448 mg of a yellow solid (74%). 1H NMR (CDCl3) δ: 8.23 (dd, J=1.4, 8.0 Hz, 1H); 7.90 (dd, J=1.4, 7.8 Hz, 1H); 7.61-7.66 (m, 1H); 7.51-7.55 (m, 3H); 7.47 (t, J=8.0 Hz, 1H); 4.48 (d, J=12 Hz, 1H), 4.12 (d, J=12 Hz, 1H). MS (ES): m/z 339.0 (M+).

1. customPrepared
2. customPurified by extraction from aqueous K2CO3
3. customfollowed by recrystallization from isopropanol