反应详情

To a stirred solution of the alcohol 3a (0.35 g, 1.4 mmol) in trifluoroacetic acid (10 mL) was added at room temperature triethylsilane (0.812 g, 7 mmol) and the reaction mixture was stirred for 24 h. Trifluoroacetic acid was evaporated in vacuo and EtOAc was added to the resulting crude product. The resulting solid was filtered and washed with H2O and EtOAc to provide the above-titled compound 6 (0.285 g, 87%). 1H NMR (DMSO-D6): δ 3.89 (s, 2H), 7.30-7.47 (m, 3H), 7.59 (d, J=6.9 Hz, 1H), 7.72-7.74 (m, 2H), 7.98 (d, J=7.8 Hz, 1H), 8.23 (d, J=8.4 Hz, 1H), 12.31 (s, 1H); 13C NMR(DMSO-D6): δ 33.51, 116.50, 120.19, 124.01, 125.51, 125.55, 126.42, 127.50, 127.68, 128.56, 133.45, 136.39, 137.53, 140.18, 143.80, 163.46; MS (ES−): m/z 232.1 (M−1); Anal. Calcd for C16H11NO: C, 82.38; H, 4.75; N, 6.00. Found: C, 81.79; H, 4.45, N, 5.99.

1. customTrifluoroacetic acid was evaporated in vacuo and EtOAc
2. additionwas added to the resulting crude product
3. filtrationThe resulting solid was filtered
4. washwashed with H2O and EtOAc