(S)-5-(o-fluorophenyl)-1,3-dihydro-1,3-dimethyl-7-nitro-2H-1,4-benzodiazepin-2-one → (S)-7-amino-5-(o-fluorophenyl)-1,3-dihydro-1,3-dimethyl-2H-1,4-benzodiazepin-2-one

HRID 1278487ノート

反応式

HRID 1278487 の反応式
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[C:14]2[CH:15]=[C:16]([N+:19]([O-])=O)[CH:17]=[CH:18][C:13]=2[N:12]([CH3:22])[C:11](=[O:23])[C@H:10]([CH3:24])[N:9]=1>Cl>[NH2:19][C:16]1[CH:17]=[CH:18][C:13]2[N:12]([CH3:22])[C:11](=[O:23])[C@H:10]([CH3:24])[N:9]=[C:8]([C:3]3[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=3[F:1])[C:14]=2[CH:15]=1

参加物

3

反応物 1

HCID 10404155(S)-5-(o-fluorophenyl)-1,3-dihydro-1,3-dimethyl-7-nitro-2H-1,4-benzodiazepin-2-one

生成物 1

HCID 53862516(S)-7-amino-5-(o-fluorophenyl)-1,3-dihydro-1,3-dimethyl-2H-1,4-benzodiazepin-2-one

試薬・触媒・溶媒 1

HCID 313Hydrochloric Acid溶媒

反応条件

温度
0 °C

実験手順

1 g of (S)-5-(o-fluorophenyl)-1,3-dihydro-1,3-dimethyl-7-nitro-2H-1,4-benzodiazepin-2-one is introduced portionwise into 10 ml of concentrated hydrochloric acid while cooling with ice at 0° C. The solution obtained is treated slowly at 0° C. with 2 g of stannous chloride, stirred for 30 minutes while cooling with ice, poured into ice/sodium bicarbonate solution and extracted several times with methylene chloride. The organic phase is dried over sodium sulphate, filtered and concentrated. After crystallisation from ether, there is obtained (S)-7-amino-5-(o-fluorophenyl)-1,3-dihydro-1,3-dimethyl-2H-1,4-benzodiazepin-2-one which crystallises with 1 mol of ether; melting point 100°-110° C. (with decomposition); [α]25D =+77.1° (in methylene chloride; 1%).

後処理

  1. customThe solution obtained
  2. temperaturewhile cooling with ice
  3. extractionextracted several times with methylene chloride
  4. dry with materialThe organic phase is dried over sodium sulphate
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customAfter crystallisation from ether

出典と根拠

ORDレコード
ord-13824ad20ec040efb41a7e722deda8e7
出典データセット
uspto-grants-1981_07
特許番号
US04281188

反応ノート

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