反応 #87498
ord-e566f82a5a89483a81882b89cf360f32
反応方程式
反応物
反応条件
後処理
- 1ろ過the mixture was filtered through a short pad of Celite®
- 2濃縮concentrated in vacuo
- 3その他The crude material was purified by flash chromatography over silica gel using a 4 g redisep silica cartridge (
- 4洗浄eluting with a gradient of 50 to 100% ethyl acetate in heptane)
実験手順
To a suspension of a mixture of (1S,2S,3S,4R,5S)-2,3,4-tris-benzyloxy-5-[4-chloro-3-(4-ethoxy-benzyl)-phenyl]-1-fluoromethyl-6,8-dioxa-bicyclo[3.2.1]octane and (1S,2S,3S,4R,5S)-2,3,4-tris-benzyloxy-5-[4-chloro-3-(4-ethoxy-benzyl)-phenyl]-1-chloromethyl-6,8-dioxa-bicyclo[3.2.1]octane (50 mg, 0.07 mmol) and palladium black (50 mg, 0.38 mmol, Aldrich® high surface area) in ethanol (0.5 mL) and tetrahydrofuran (0.1 mL) was added formic acid (0.10 mL, 2.80 mmol) and the resulting mixture was stirred at room temperature for 1.5 hours. Ethyl acetate was added and the mixture was filtered through a short pad of Celite® and concentrated in vacuo. The crude material was purified by flash chromatography over silica gel using a 4 g redisep silica cartridge (eluting with a gradient of 50 to 100% ethyl acetate in heptane) to afford the title compound as a solid (8.6 mg; ˜80% pure, contaminated with some Example 8). (LCMS) 455.2 (M+H+: positive mode). 1H NMR (400 MHz, METHANOL-d4) delta ppm 7.40 (t, J=1.17 Hz, 1 H), 7.34 (s, 1 H), 7.34 (s, 1 H), 7.05-7.09 (m, 2 H), 6.76-6.80 (m, 2 H), 4.18 (d, J=7.61 Hz, 1 H), 4.01 (s, 2 H), 3.97 (q, J=7.03 Hz, 2 H), 3.90 (d, J=12.30 Hz, 1H), 3.83 (dd, J=8.20, 1.56 Hz, 1 H), 3.72 (d, J=12.30 Hz, 1 H), 3.60-3.65 (m, 2H), 3.50-3.54 (m, 1 H), 1.33 (t, J=7.03 Hz, 3 H).