Water → (RS)-3-ethoxycarbonyl-7,9-difluoro-1-methyl-8-(3-methyl-1-piperazinyl)-4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine

HRID 1073627ノート

反応式

HRID 1073627 の反応式
[CH2:1]([O:3][C:4]([C:6]1[C:7](=[O:24])[C:8]2[CH:9]=[C:10]3[CH:20]=[C:19]([F:21])[C:18](F)=[C:17]([F:23])[C:11]3=[N:12][C:13]=2[N:14]([CH3:16])[CH:15]=1)=[O:5])[CH3:2].[CH3:25][CH:26]1[CH2:31][NH:30][CH2:29][CH2:28][NH:27]1.O.C(=O)([O-])[O-].[K+].[K+]>CS(C)=O>[CH2:1]([O:3][C:4]([C:6]1[C:7](=[O:24])[C:8]2[CH:9]=[C:10]3[CH:20]=[C:19]([F:21])[C:18]([N:30]4[CH2:29][CH2:28][NH:27][CH:26]([CH3:25])[CH2:31]4)=[C:17]([F:23])[C:11]3=[N:12][C:13]=2[N:14]([CH3:16])[CH:15]=1)=[O:5])[CH3:2]

参加物

6

反応物 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 660572-MethylpiperazineHCID 194236883-Ethoxycarbonyl-7,8,9-trifluoro-1-methyl-4-oxo-1,4-dihydrobenzo[b][1,8]naphthyridine

生成物 1

HCID 20063299(RS)-3-ethoxycarbonyl-7,9-difluoro-1-methyl-8-(3-methyl-1-piperazinyl)-4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine収率 64.6%

試薬・触媒・溶媒 1

HCID 679Dimethyl Sulfoxide溶媒

実験手順

A suspension of 2 g of 3-ethoxycarbonyl-7,8,9-trifluoro-1-methyl-4-oxo-1,4-dihydro-benzo[b][1,8]naphthyridine in 30 cm3 of dimethyl sulphoxide and 5 g of 2-methylpiperazine is heated at a temperature close to 100° C., with stirring, for 2 hours. The solution obtained is poured, at this temperature, with stirring, into a mixture of 150 cm3 of water and 50 g of ice. 5 g of potassium carbonate are added at about 20° C. and the mixture is extracted with 3 times 50 cm3 of trichloromethane. The combined organic extracts are washed with twice 50 cm: of water, dried over magnesium sulphate, filtered and concentrated to dryness under reduced pressure (20 kPa) at about 50° C. The residue obtained is recrystallized from 30 cm3 of ethanol. 1.6 g of (RS)-3-ethoxycarbonyl-7,9-difluoro-1-methyl-8-(3-methyl-1-piperazinyl)-4-oxo-1,4-dihydro-benzo[ b][1,8]naphthyridine are obtained in the form of a yellow solid melting at 240° C.

後処理

  1. temperatureis heated at a temperature
  2. customclose to 100° C.
  3. customThe solution obtained
  4. additionis poured, at this temperature
  5. extractionthe mixture is extracted with 3 times 50 cm3 of trichloromethane
  6. washThe combined organic extracts are washed with twice 50 cm
  7. dry with materialof water, dried over magnesium sulphate
  8. filtrationfiltered
  9. concentrationconcentrated to dryness under reduced pressure (20 kPa) at about 50° C
  10. customThe residue obtained
  11. customis recrystallized from 30 cm3 of ethanol

出典と根拠

ORDレコード
ord-04133c0c76a5494fb5107ec30619acaa
出典データセット
uspto-grants-1990_11
特許番号
US04970213

反応ノート

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