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Diethyl Ether → 3-[2-(2,5-Dimethyl-pyrrol-1-yl)-4-trifluoromethyl-thiazol-5-yl]-7-(1-ethyl-propyl)-2,5-dimethyl-pyrazolo[1,5-a]pyrimidine

HRID 1660759
ノート
印刷プレビュー

反応式

HRID 1660759 の反応式
Br[C:2]1[S:6][C:5]([N:7]2[C:11]([CH3:12])=[CH:10][CH:9]=[C:8]2[CH3:13])=[N:4][C:3]=1[C:14]([F:17])([F:16])[F:15].C([Li])(C)(C)C.[CH2:23]([CH:25]([C:28]1[N:33]2[N:34]=[C:35]([CH3:38])[C:36](I)=[C:32]2[N:31]=[C:30]([CH3:39])[CH:29]=1)[CH2:26][CH3:27])[CH3:24].C(OCC)C>C1COCC1.[Cl-].[Zn+2].[Cl-].CC(C)([P](C(C)(C)C)([Pd][P](C(C)(C)C)(C(C)(C)C)C(C)(C)C)C(C)(C)C)C>[CH3:13][C:8]1[N:7]([C:5]2[S:6][C:2]([C:36]3[C:35]([CH3:38])=[N:34][N:33]4[C:28]([CH:25]([CH2:23][CH3:24])[CH2:26][CH3:27])=[CH:29][C:30]([CH3:39])=[N:31][C:32]=34)=[C:3]([C:14]([F:17])([F:16])[F:15])[N:4]=2)[C:11]([CH3:12])=[CH:10][CH:9]=1
参加物実験手順後処理出典と根拠反応ノート

参加物

8

反応物 4

HCID 3283Diethyl EtherHCID 248985233-Iodo-2,5-dimethyl-7-(pentan-3-yl)pyrazolo[1,5-a]pyrimidineHCID 674291065-Bromo-2-(2,5-dimethyl-pyrrol-1-yl)-4-trifluoromethyl-thiazoleHCID 178418306HCID 178418306、化合物

生成物 1

HCID 594740583-[2-(2,5-Dimethyl-pyrrol-1-yl)-4-trifluoromethyl-thiazol-5-yl]-7-(1-ethyl-propyl)-2,5-dimethyl-pyrazolo[1,5-a]pyrimidine収率 72.4%

試薬・触媒・溶媒 3

HCID 3007855Zincchloride触媒HCID 178418851HCID 178418851、化合物触媒HCID 8028Tetrahydrofuran溶媒

実験手順

Cool a solution of 5-bromo-2-(2,5-dimethyl-pyrrol-1-yl)-4-trifluoromethyl-thiazole (2.2 g, 6.6 mmol) in THF (25 mL) in a dry ice bath. Add t-butyl lithium (1.7 M in pentane, 8.5 mL, 14.5 mmol) dropwise. Stir for 45 min and then add zinc chloride (0.5 M in THF, 14.6 mL, 7.3 mmol) dropwise. Stir 5 min and remove the cooling bath. Stir 30 min and then add 7-(1-ethyl-propyl)-3-iodo-2,5-dimethyl-pyrazolo[1,5-a]pyrimidine (1.5 g, 4.4 mmol) and bis(tri-t-butylphosphine)palladium (0) (450 mg, 0.9 mmol). Reflux for 24 h. Cool the reaction, pour the mixture into diethyl ether, and wash with water (2×). Extract the combined water layers with diethyl ether. Dry the combined organic portions over sodium sulfate, filter, and concentrate to dryness under vacuum. Purify the resulting residue by silica gel chromatography (75-100% CH2Cl2 in hexanes) to give the title compound (1.47 g, 72%). HR-ToF-MS m/z calcd for C23H26F3N5S+H+: 462.1939, found: 462.1915.

後処理

  1. stirringStir 5 min
  2. customremove the cooling bath
  3. stirringStir 30 min
  4. temperatureReflux for 24 h
  5. temperatureCool
  6. customthe reaction
  7. washwash with water (2×)
  8. extractionExtract the combined water layers with diethyl ether
  9. dry with materialDry the combined organic portions over sodium sulfate
  10. filtrationfilter
  11. concentrationconcentrate to dryness under vacuum
  12. customPurify the resulting residue by silica gel chromatography (75-100% CH2Cl2 in hexanes)

出典と根拠

ORDレコード
ord-e5b3ae756091406ba1fab4b407a04d2b
出典データセット
uspto-grants-2011_10
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08030304B2

反応ノート

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