Formaldehyde → Ro 14-7437

HRID 67319

反応式

HRID 67319 の反応式
[NH2:1][C:2](=[C:8]1[CH2:14][N:13]([CH3:15])[C:12](=[O:16])[C:11]2[CH:17]=[CH:18][CH:19]=[CH:20][C:10]=2[NH:9]1)[C:3]([O:5][CH2:6][CH3:7])=[O:4].[CH2:21]=O>C(Cl)Cl>[CH3:15][N:13]1[C:12](=[O:16])[C:11]2[CH:17]=[CH:18][CH:19]=[CH:20][C:10]=2[N:9]2[CH:21]=[N:1][C:2]([C:3]([O:5][CH2:6][CH3:7])=[O:4])=[C:8]2[CH2:14]1

参加物

4

反応物 2

HCID 712FormaldehydeHCID 70541641ethyl alpha-amino-1,3,4,5-tetrahydro-4-methyl-5-oxo-2H-1,4-benzodiazepin-2-ylidene-acetate

生成物 1

HCID 127597Ro 14-7437

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

1.0 g of ethyl α-amino-1,3,4,5-tetrahydro-4-methyl-5-oxo-2H-1,4-benzodiazepin-2-ylidene-acetate are dissolved in 20 ml of methylene chloride, treated with 0.65 ml of 37 percent aqueous formaldehyde solution and stirred in the presence of air at room temperature for 2 hours. The solution is subsequently washed twice with 10 ml of water each time. The organic phase is separated, dried and decolourised with active carbon. After filtration of the carbon, the filtrate is evaporated in vacuo and the residue is chromatographed on 20 g of silica gel. Elution is carried out firstly with chloroform and subsequently with chloroform/ethanol (985:15). The fractions which contain ethyl 5,6-dihydro-5-methyl-6-oxo-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylate as the main component are combined and evaporated in vacuo. The residue is dissolved in ethanol and crystallised by the addition of diisopropyl ether. There is obtained ethyl 5,6-dihydro-5-methyl-6-oxo-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylate of melting point 162°-164° C.

後処理

  1. washThe solution is subsequently washed twice with 10 ml of water each time
  2. customThe organic phase is separated
  3. customdried
  4. filtrationAfter filtration of the carbon
  5. customthe filtrate is evaporated in vacuo
  6. customthe residue is chromatographed on 20 g of silica gel
  7. washElution
  8. customevaporated in vacuo
  9. dissolutionThe residue is dissolved in ethanol
  10. customcrystallised by the addition of diisopropyl ether

出典と根拠

ORDレコード
ord-34ed473f514a4ad88b0777a86c397cc9
出典データセット
uspto-grants-1982_08
特許番号
US04346030

関連ノート

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