反应详情

Synthesized using compound 43b (650 mg, 3.75 mmol) and furan-2-ylmagnesium bromide (1.85 g, 10.8 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 (6:1) as eluent. Yellow solid. Yield: 631 mg, 67%. 1H NMR (CDCl3, 500 MHz): δH (ppm)=3.62 (br. s., 1H), 5.86 (s, 1H), 6.17 (d, J=3.4 Hz, 1H), 6.33 (dd, J=3.0, 1.8 Hz, 1H), 7.33-7.51 (m, 4H), 7.69 (d, J=7.9 Hz, 1H), 7.83 (dd, J=8.2, 1.8 Hz, 1H), 7.88-7.99 (m, 2H); 13C NMR (CDCl3, 125 MHz): δC (ppm)=66.7, 106.7, 109.3, 119.4, 126.0, 127.7, 128.0, 134.0, 134.3, 137.9, 141.8, 147.1, 154.1, 156.1; (ESI): m/z=251.87 [M+H]+.

1. customSynthesized
2. customCrude product was purified by flash chromatography on silica-gel
3. additiona mixture of hexane/ethyl acetate (6:1) as eluent