Hydrochloric Acid → 4-amino-2-chloro-N,N-dimethylbenzamide

HRID 359049

反応式

HRID 359049 の反応式
O.Cl.[Cl:3][C:4]1[CH:14]=[C:13]([N+:15]([O-])=O)[CH:12]=[CH:11][C:5]=1[C:6]([N:8]([CH3:10])[CH3:9])=[O:7]>C(O)C.[Fe]>[NH2:15][C:13]1[CH:12]=[CH:11][C:5]([C:6]([N:8]([CH3:10])[CH3:9])=[O:7])=[C:4]([Cl:3])[CH:14]=1

参加物

6

反応物 3

HCID 313Hydrochloric AcidHCID 962WaterHCID 32645532-chloro-N,N-dimethyl-4-nitrobenzamide

生成物 1

HCID 109434804-amino-2-chloro-N,N-dimethylbenzamide収率 80%

試薬・触媒・溶媒 2

HCID 23925Iron触媒HCID 702Ethanol溶媒

実験手順

Iron powder (pre-reduced with hydrogen, 10.0 g) was suspended in ethanol (80 ml) and water (10 ml) and concentrated hydrochloric acid (4 ml) were added with vigorous stirring. 2-Chloro-4-nitro-N,N-dimethylbenzamide (7.50 g) was added in small portions over 15 minutes and the mixture then heated to 50°-60° C. and stirred for 5 hours. The mixture was filtered through Celite and the ethanol evaporated. Water (200 ml) and concentrated hydrochloric acid (20 ml) were added and the reaction washed with ethyl acetate and then basified to pH8 with sodium bicarbonate and extracted with methylene chloride. The organic extract was dried and evaporated to give 4-amino-2-chloro-N,N-dimethylbenzamide as a grey crystalline solid (5.21 g) which was recrystallised from chloroform/ethyl acetate to give off-white crystals (3.46 g, m.p. 170°-173° C.).

後処理

  1. temperaturethe mixture then heated to 50°-60° C.
  2. filtrationThe mixture was filtered through Celite
  3. customthe ethanol evaporated
  4. additionWater (200 ml) and concentrated hydrochloric acid (20 ml) were added
  5. washthe reaction washed with ethyl acetate
  6. extractionextracted with methylene chloride
  7. extractionThe organic extract
  8. customwas dried
  9. customevaporated

出典と根拠

ORDレコード
ord-68c8143dd2d6430eaa798df8ebbbc439
出典データセット
uspto-grants-1991_03
特許番号
US04999381

関連ノート

読み込み中…