Potassium Carbonate → 3-(5-Amino-3-tert-butyl-pyrazol-1-yl)-5-chloro-benzoic acid ethyl ester

HRID 60630

반응식

HRID 60630 반응식
[C:1]([C:5]1[CH:9]=[C:8]([NH2:10])[NH:7][N:6]=1)([CH3:4])([CH3:3])[CH3:2].C(=O)([O-])[O-].[K+].[K+].[CH2:17]([O:19][C:20](=[O:29])[C:21]1[CH:26]=[C:25]([Cl:27])[CH:24]=[C:23](Br)[CH:22]=1)[CH3:18]>[Cu]I>[CH2:17]([O:19][C:20](=[O:29])[C:21]1[CH:26]=[C:25]([Cl:27])[CH:24]=[C:23]([N:7]2[C:8]([NH2:10])=[CH:9][C:5]([C:1]([CH3:4])([CH3:3])[CH3:2])=[N:6]2)[CH:22]=1)[CH3:18]

참가 물질

5

실험 절차

3-(Tert-butyl)-1H-pyrazol-5-amine (1.10 g, 7.90 mmol), potassium carbonate (2.29 g, 16.6 mmol), and copper (I) iodide (75.0 mg, 1.58 mmol) were weighed into a microwave vial and purged with argon. 3-Bromo-5-chloro-benzoic acid ethyl ester (2.50 g, 9.49 mmol) was then added, followed by trans-N,N′-dimethylcyclohexane-diamine (225 mg, 1.58 mmol) and the reaction vessel purged with argon. The reagents were then solvated with toluene (8 mL), and then degassed with argon, sealed and subjected to microwave irradiation (135° C., 6 h). The reaction mixture was filtered through Celite, concentrated in vacuo and purified by FCC, eluting with 0-10% EtOAc/cyclohexane, to afford the title compound (489 mg, 19%). LCMS (Method 3) Rt 4.26 min, 322.1 [MH+].

후처리

  1. custompurged with argon
  2. customthe reaction vessel purged with argon
  3. customdegassed with argon
  4. customsealed
  5. customsubjected to microwave irradiation (135° C., 6 h)
  6. filtrationThe reaction mixture was filtered through Celite
  7. concentrationconcentrated in vacuo
  8. custompurified by FCC
  9. washeluting with 0-10% EtOAc/cyclohexane

출처 및 근거

ORD 기록
ord-7f6e2e9652804116b1b191dc45c8235d
출처 데이터셋
uspto-grants-2016_09
특허 번호
US09440974B2

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