Piperazine → 3-Benzenesulphonyl-5-methyl-2-methylsulphanyl-7-piperazin-1-yl-pyrazolo[1,5-a]pyrimidine

HRID 636381ノート

反応式

HRID 636381 の反応式
[NH:1]1[CH2:6][CH2:5][NH:4][CH2:3][CH2:2]1.[C:7]1([S:13]([C:16]2[C:17]([S:27][CH3:28])=[N:18][N:19]3[C:24](Cl)=[CH:23][C:22]([CH3:26])=[N:21][C:20]=23)(=[O:15])=[O:14])[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1>CN(C=O)C>[C:7]1([S:13]([C:16]2[C:17]([S:27][CH3:28])=[N:18][N:19]3[C:24]([N:1]4[CH2:6][CH2:5][NH:4][CH2:3][CH2:2]4)=[CH:23][C:22]([CH3:26])=[N:21][C:20]=23)(=[O:15])=[O:14])[CH:8]=[CH:9][CH:10]=[CH:11][CH:12]=1

参加物

4

反応物 2

HCID 4837PiperazineHCID 109810973-Benzenesulphonyl-7-chloro-5-methyl-2-methylsulphanyl-pyrazolo[1,5-a]pyrimidine

生成物 1

HCID 98013133-Benzenesulphonyl-5-methyl-2-methylsulphanyl-7-piperazin-1-yl-pyrazolo[1,5-a]pyrimidine収率 51%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒2 回

反応条件

温度
60 °C

実験手順

0.3 g (3.4 mmol) of piperazine in 10 ml of DMF was added to a solution of 0.6 g (1.7 mmol) of 3-benzenesulphonyl-7-chloro-5-methyl-2-methylsulphanyl-pyrazolo[1,5-a]pyrimidine in 10 ml of DMF and the mixture was stirred at 60° C. for 2 hrs. The reaction solution was cooled to RT and evaporated in a high vacuum. The residue was partitioned between 2N NaOH and CH2Cl2. The aqueous phase was extracted three times with CH2Cl2, and the combined organic phases were dried (MgSO4), filtered and evaporated. Subsequent chromatography (SiO2, CH2Cl2/MeOH 8:1) and crystallization from EtOH yielded 0.35 g (51%) of 3-benzenesulphonyl-5-methyl-2-methylsulphanyl-7-piperazin-1-yl-pyrazolo[1,5-a]pyrimidine as colorless crystals, m.p. 201-202°.

後処理

  1. temperatureThe reaction solution was cooled to RT
  2. customevaporated in a high vacuum
  3. customThe residue was partitioned between 2N NaOH and CH2Cl2
  4. extractionThe aqueous phase was extracted three times with CH2Cl2
  5. dry with materialthe combined organic phases were dried (MgSO4)
  6. filtrationfiltered
  7. customevaporated
  8. customSubsequent chromatography (SiO2, CH2Cl2/MeOH 8:1) and crystallization from EtOH

出典と根拠

ORDレコード
ord-bfa1e3a3a5b84ad3a46572f38328fee4
出典データセット
uspto-grants-2001_02
特許番号
US06194410B1

反応ノート

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