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Cesium carbonate → 2-(1H-pyrazol-4-ylamino)-5-(4-(4-(tert-butoxycarbonyl)piperazin-1-yl)phenyl)oxazole-4-carboxylic acid

HRID 1410496
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HRID 1410496 반응식
C([O:3][C:4]([C:6]1[N:7]=[C:8](I)[O:9][C:10]=1[C:11]1[CH:16]=[CH:15][C:14]([N:17]2[CH2:22][CH2:21][N:20]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])[CH2:19][CH2:18]2)=[CH:13][CH:12]=1)=[O:5])C.[NH2:31][C:32]1[CH:33]=[N:34][N:35](C(OC(C)(C)C)=O)[CH:36]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CC1(C)C2C=CC=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=2OC2C1=CC=CC=2P(C1C=CC=CC=1)C1C=CC=CC=1>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].O1CCOCC1>[NH:34]1[CH:33]=[C:32]([NH:31][C:8]2[O:9][C:10]([C:11]3[CH:16]=[CH:15][C:14]([N:17]4[CH2:22][CH2:21][N:20]([C:23]([O:25][C:26]([CH3:29])([CH3:27])[CH3:28])=[O:24])[CH2:19][CH2:18]4)=[CH:13][CH:12]=3)=[C:6]([C:4]([OH:3])=[O:5])[N:7]=2)[CH:36]=[N:35]1
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참가 물질

7

반응물 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 59587648tert-butyl 4-amino-1H-pyrazole-1-carboxylateHCID 68522092Tert-butyl 4-(4-(4-(ethoxycarbonyl)-2-iodooxazol-5-yl)phenyl)piperazine-1-carboxylate

생성물 1

HCID 595875682-(1H-pyrazol-4-ylamino)-5-(4-(4-(tert-butoxycarbonyl)piperazin-1-yl)phenyl)oxazole-4-carboxylic acid
수율 26.1%

시약·촉매·용매 2

HCID 9811564Bis(dibenzylideneacetone)palladium촉매HCID 312751,4-Dioxane용매

실험 절차

A mixture of tert-butyl 4-(4-(4-(ethoxycarbonyl)-2-iodooxazol-5-yl)phenyl)piperazine-1-carboxylate (0.150 g, 0.28 mmol), tert-butyl 4-amino-1H-pyrazole-1-carboxylate (0.261 g, 1.42 mmol), cesium carbonate (0.462 g, 2.39 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.012 g, 0.013 mmol) and 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene (0.0165 g, 0.029 mmol) tBuOH (4.5 ml) and dioxane (4.5 ml) was degassed, placed under a nitrogen atmosphere and then stirred under reflux overnight. The reaction mixture was passed through a MP-SH cartridge and the solvent removed in vacuo. The residue was partitioned between water and EtOAc and the aqueous phase extracted with EtOAc and DCM. The combined organic phases were dried over MgSO4 and the solvent removed in vacuo. The residue was purified by preparative HPLC to afford 2-(1H-pyrazol-4-ylamino)-5-(4-(4-(tert-butoxycarbonyl)piperazin-1-yl)phenyl)oxazole-4-carboxylic acid (0.033 g, 0.073 mmol, 26%). LCMS (2) Rt: 1.68 min; m/z (ES+) 455.

후처리

  1. customwas degassed
  2. temperatureunder reflux overnight
  3. customthe solvent removed in vacuo
  4. customThe residue was partitioned between water and EtOAc
  5. extractionthe aqueous phase extracted with EtOAc and DCM
  6. dry with materialThe combined organic phases were dried over MgSO4
  7. customthe solvent removed in vacuo
  8. customThe residue was purified by preparative HPLC

출처 및 근거

ORD 기록
ord-bcc72fb39f534687910c306678386203
출처 데이터셋
uspto-grants-2014_12
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08921544B2

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