反应详情

Synthesized using compound 61b (760 mg, 4.49 mmol), NBS (878 mg, 4.93 mmol) and DBPO (54 mg, 0.23 mmol) in carbon tetrachloride according to Method A. Crude product was purified by flash chromatography on silica-gel using hexane/ethyl acetate (8:1) as eluent. White solid. Yield: 297 mg, 73%. 1H NMR (CDCl3, 500 MHz): δH (ppm)=4.54 (s, 2H), 7.42-7.53 (m, 3H), 7.71-7.77 (m, 1H), 7.80-7.85 (m, 1H), 7.98-8.04 (m, 2H), 8.72-8.76 (m, 1H); 13C NMR (CDCl3, 125 MHz): δC (ppm)=29.7, 120.6, 127.0, 128.4, 128.8, 130.1, 137.6, 138.5, 149.6, 157.36; (ESI): m/z=249.66 [M+H]+.

1. customSynthesized
2. customCrude product was purified by flash chromatography on silica-gel