Pyridine → N-(5-bromopyridin-3-yl)-2-methylpropanamide

HRID 889134

反応式

HRID 889134 の反応式
[NH2:1][C:2]1[CH:3]=[N:4][CH:5]=[C:6]([Br:8])[CH:7]=1.N1C=CC=CC=1.[C:15](Cl)(=[O:19])[CH:16]([CH3:18])[CH3:17]>C(Cl)Cl>[Br:8][C:6]1[CH:7]=[C:2]([NH:1][C:15](=[O:19])[CH:16]([CH3:18])[CH3:17])[CH:3]=[N:4][CH:5]=1

参加物

5

反応物 3

HCID 1049PyridineHCID 62325Isobutyryl chlorideHCID 8176813-Amino-5-bromopyridine

生成物 1

HCID 68195778N-(5-bromopyridin-3-yl)-2-methylpropanamide収率 71%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒2 回

反応条件

温度
0 °C

実験手順

3-Amino-5-bromo pyridine (XVIII) (1 eq) was dissolved in DCM and cooled to 0° C. before adding pyridine (2.2 eq) and isobutyryl chloride (XIX) (1.1 eq). The reaction mixture was stirred at r.t. for 15 h until TLC showed the reaction was complete. The reaction mixture was diluted with DCM and washed with water. The organic extract was dried, concentrated and purified by column chromatography using silica gel (100-200 mesh) to afford N-(5-bromopyridin-3-yl)isobutyramide (XX) as a off white solid, (71% yield). 1H NMR (CDCl3) δ ppm 8.55-8.35 (m, 3H), 7.32 (s, 1H), 2.59-2.48 (m, 1H), 1.28-1.27 (d, 6H); ESIMS found C9H11BrN2O m/z 243.05 (M+H).

後処理

  1. washwashed with water
  2. extractionThe organic extract
  3. customwas dried
  4. concentrationconcentrated
  5. custompurified by column chromatography

出典と根拠

ORDレコード
ord-5cba7cac7c3140dcb823249f3b217b29
出典データセット
uspto-grants-2012_08
特許番号
US08252812B2

関連ノート

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