反应详情

Synthesized using compound 43b (300 mg, 1.73 mmol) and phenylmagnesium bromide (1.73 mL, 3.46 mmol, 2 M in THF) according to Method D. Crude product was purified by flash chromatography on silica-gel using a mixture of hexane/ethyl acetate (3:1) as eluent. Yellow solid. Yield: 138 mg, 42%. 1H NMR (CDCl3, 500 MHz): δH (ppm)=5.91 (s, 1H), 7.29-7.34 (m, 1H), 7.35-7.50 (m, 7H), 7.68 (dd, J=8.2, 0.6 Hz, 1H), 7.73-7.78 (m, 1H), 7.94-7.99 (m, 2H), 8.68 (dd, J=1.6, 0.6 Hz, 1H); 13C NMR (CDCl3, 125 MHz): δC (ppm)=74.1, 120.3, 126.5, 126.9, 128.0, 128.7, 128.7, 128.9, 135.0, 137.6, 139.0, 143.0, 148.2, 156.7; (ESI): m/z=261.97 [M+H]+.

1. customSynthesized
2. customCrude product was purified by flash chromatography on silica-gel
3. additiona mixture of hexane/ethyl acetate (3:1) as eluent