Phosphorus oxychloride → 4-chloro-5-nitropyrimidin-2-amine

HRID 619220ノート

反応式

HRID 619220 の反応式
[NH2:1][C:2]1[N:7]=[C:6](O)[C:5]([N+:9]([O-:11])=[O:10])=[CH:4][N:3]=1.P(Cl)(Cl)([Cl:14])=O>>[NH2:1][C:2]1[N:7]=[C:6]([Cl:14])[C:5]([N+:9]([O-:11])=[O:10])=[CH:4][N:3]=1

参加物

3

反応物 2

HCID 24813Phosphorus oxychlorideHCID 178508524HCID 178508524、化合物

生成物 1

HCID 3199954-chloro-5-nitropyrimidin-2-amine

実験手順

A suspension of 2-amino-4-hydroxy-5-nitropyrimidine (5.0 g, 32.1 mmol) in phosphorous oxychloride (100 mL) was refluxed overnight, and the excess phosphorous oxychloride was evaporated under reduced pressure. The residue was mixed with ice (100 g) in an ice-bath, and the mixture was neutralized with concentrated aqueous sodium carbonate solution. A yellow precipitate was collected by filtration and washed with water: yield, 1.39 g (25%); mp 191-194° C. dec.; 1H NMR d 8.45 (br s, 2 H, NH2, exchange with D2O), 9.03 (s, 1 H, H-6); MS (EI) calcd. m/z for C4H3N4O235Cl 173.9944, found 173.9934; calcd. m/z for C4H3N4O237Cl 175.9915, found 175.9916.

後処理

  1. temperaturewas refluxed overnight
  2. customthe excess phosphorous oxychloride was evaporated under reduced pressure
  3. additionThe residue was mixed with ice (100 g) in an ice-bath
  4. filtrationA yellow precipitate was collected by filtration
  5. washwashed with water
  6. customyield

出典と根拠

ORDレコード
ord-db49e4cd90cf4217ac77488d778a468b
出典データセット
uspto-grants-1999_09
特許番号
US05958932

反応ノート

読み込み中…