Hydrogen Bromide → 6-Bromo-4-methylpyridin-2-amine
反応式
[C:1]([CH2:3][C:4]([CH3:9])(O)[CH2:5][C:6]#[N:7])#[N:2].[BrH:10]>C(O)(=O)C>[NH2:2][C:1]1[N:7]=[C:6]([Br:10])[CH:5]=[C:4]([CH3:9])[CH:3]=1参加物
4
実験手順
56.4 g of 1,3-dicyano-2-methyl-2-hydroxypropane was added carefully to a 33% solution of hydrogen bromide in glacial acetic acid at ice-bath temperature. The reaction mixture was then stirred for 3 days at ambient temperature. The solvent was removed in vacuo and the residual oil was brought to pH 12 with a 10 molar aqueous solution of sodium hydroxide. This alkaline solution was extracted three times each with 100 ml ethyl acetate. The combined organic layers were dried with magnesium sulphate and the solvent removed in vacuo. 56 g (66%) of 6-amino-2-bromo-4-methylpyridine was obtained as a colourless solid of melting point 99° C.
後処理
- customThe solvent was removed in vacuo
- extractionThis alkaline solution was extracted three times each with 100 ml ethyl acetate
- dry with materialThe combined organic layers were dried with magnesium sulphate
- customthe solvent removed in vacuo
出典と根拠
- ORDレコード
- ord-632a4308ac39432e90cd94e0dae25135
- 出典データセット
- uspto-grants-1998_01
- 特許番号
- US05707933
反応ノート
読み込み中…