Ethyl Acetate → 2-(2-Bromopyridin-4-YL)acetonitrile
反応式
[Br:1][C:2]1[CH:7]=[C:6]([CH2:8]OS(C)(=O)=O)[CH:5]=[CH:4][N:3]=1.[C-:14]#[N:15].[K+].CCOC(C)=O.C(=O)(O)[O-].[Na+]>C(O)C.O>[Br:1][C:2]1[CH:7]=[C:6]([CH2:8][C:14]#[N:15])[CH:5]=[CH:4][N:3]=1参加物
7
実験手順
Methanesulfonic acid 2-bromopyridin-4-ylmethyl ester (4.24 g, 15.9 mmol) is added to a stirred solution of potassium cyanide (1.02 g, 15.1 mmol) in a mixture of ethanol (30 mL) and water (6 mL) at room temperature. After 72 hours, EtOAc (80 mL) and saturated aqueous sodium bicarbonate (40 mL) are added and the organic layer is separated. The organic layer is washed with water (3×40 mL), dried over MgSO4, filtered and concentrated. The resulting residue is purified by silica gel chromatography eluting with a gradient of 0-60% EtOAc in heptane to afford (2-bromopyridin-4-yl)-acetonitrile. MS m/z 197.4, 199.4.
後処理
- customthe organic layer is separated
- washThe organic layer is washed with water (3×40 mL)
- dry with materialdried over MgSO4
- filtrationfiltered
- concentrationconcentrated
- customThe resulting residue is purified by silica gel chromatography
- washeluting with a gradient of 0-60% EtOAc in heptane
出典と根拠
- ORDレコード
- ord-3e0f8e4c476041038193bf14a8149326
- 出典データセット
- uspto-grants-2015_01
- 特許番号
- US08927550B2
反応ノート
読み込み中…