反応式
[P:1]([O:6]C)([O:4][CH3:5])[O:2][CH3:3].[CH2:8]1[O:12][C@@H:11]2[C@H:13]([O:16][N+:17]([O-:19])=[O:18])[CH2:14][O:15][C@@H:10]2[C@H:9]1[OH:20].C(Br)(Br)(Br)Br>N1C=CC=CC=1>[P:1]([O:20][C@H:9]1[CH2:8][O:12][C@@H:11]2[C@H:13]([O:16][N+:17]([O-:19])=[O:18])[CH2:14][O:15][C@H:10]12)([O:4][CH3:5])([O:2][CH3:3])=[O:6]参加物
実験手順
Trimethyl phosphite (2.95 mL, 25.0 mmol) was added dropwise over ca. 1 hour to a stirred 0° C. mixture of isosorbide-5-mononitrate (3.82 g, 20.0 mmol) and carbon tetrabromide (7.30 g, 22.0 mmol) in pyridine (10 mL), and the mixture was stirred at room temperature for 3 hours. The reaction was partitioned between 1M hydrochloric acid and diethyl ether/ethyl acetate (1:1). The aqueous phase was extracted with diethyl ether. The combined organic extracts were washed with saturated aqueous sodium hydrogen carbonate and brine, dried (sodium sulfate), filtered and concentrated in vacuo. Chromatography over silica eluting with 50-100% ethyl acetate/hexane afforded the title compound as an orange solid. 1H NMR (500 MHz, CD3OD) δ 5.46 (td, J=5.5, 2.2 Hz, 1H), 5.02 (t, J=5.3 Hz, 1H), 4.82 (dd, J=6.8, 2.7 Hz, 1H), 4.58 (d, J=5.1 Hz, 1H), 4.10 (d, J=10.7 Hz, 1H), 3.99 (dd, J=11.5, 2.1 Hz, 1H), 3.91 (dd, J=11.4, 5.2 Hz, 1H), 3.88 (dt, J=11.0, 2.4 Hz, 1H), 3.80 (d, J=2.7 Hz, 3H), 3.78 (d, J=2.7 Hz, 3H); LC-MS: m/z 300.0 (M+H).
後処理
- customThe reaction was partitioned between 1M hydrochloric acid and diethyl ether/ethyl acetate (1:1)
- extractionThe aqueous phase was extracted with diethyl ether
- washThe combined organic extracts were washed with saturated aqueous sodium hydrogen carbonate and brine
- dry with materialdried (sodium sulfate)
- filtrationfiltered
- concentrationconcentrated in vacuo
出典と根拠
- ORDレコード
- ord-848f1bfb7463414c81c8f9c0afce36d7
- 出典データセット
- uspto-grants-2012_06
- 特許番号
- US08207208B2
関連ノート
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