Sodium Hydroxide → 2,2,2-Trichloroethyl 3-tert-butyl-1-(4-cyanophenyl)-1H-pyrazol-5-ylcarbamate

HRID 75592노트

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HRID 75592 반응식
[NH2:1][C:2]1[N:6]([C:7]2[CH:14]=[CH:13][C:10]([C:11]#[N:12])=[CH:9][CH:8]=2)[N:5]=[C:4]([C:15]([CH3:18])([CH3:17])[CH3:16])[CH:3]=1.[OH-].[Na+].Cl[C:22]([O:24][CH2:25][C:26]([Cl:29])([Cl:28])[Cl:27])=[O:23]>CCOC(C)=O>[Cl:27][C:26]([Cl:29])([Cl:28])[CH2:25][O:24][C:22](=[O:23])[NH:1][C:2]1[N:6]([C:7]2[CH:14]=[CH:13][C:10]([C:11]#[N:12])=[CH:9][CH:8]=2)[N:5]=[C:4]([C:15]([CH3:18])([CH3:17])[CH3:16])[CH:3]=1

참가 물질

5

반응물 3

HCID 14798Sodium HydroxideHCID 870632,2,2-Trichloroethyl chloroformate2회HCID 71470834-(5-Amino-3-tert-butyl-1H-pyrazol-1-yl)benzonitrile

생성물 1

HCID 687825092,2,2-Trichloroethyl 3-tert-butyl-1-(4-cyanophenyl)-1H-pyrazol-5-ylcarbamate수율 79.1%

시약·촉매·용매 1

HCID 8857Ethyl Acetate용매

실험 절차

To a suspension of Intermediate 14a (2.28 g, 9.49 mmol) in EtOAc (25 mL) and aq. NaOH solution (1M, 23.7 mL, 23.7 mmol) was added 2,2,2-trichloroethyl chloroformate (1.57 mL, 11.4 mmol) dropwise over 2 min. A precipitate formed which redissolved after 15 min, then the orange solution was stirred at RT for 90 min. 2,2,2-Trichloroethyl chloroformate (0.391 mL, 2.85 mmol) was added, and the orange mixture stirred at RT for 16 h. The layers were separated, and the aqueous extracted with EtOAc (25 mL). The combined organics were washed with brine (25 mL), dried (Na2SO4), filtered and concentrated in vacuo to leave an orange-red oil. Recrystallisation from cyclohexane gave an off-white solid (3.12 g, 79%). LCMS (Method 3): Rt 4.46 min, m/z 415, 417 [MH+].

후처리

  1. customA precipitate formed which
  2. dissolutionredissolved after 15 min
  3. stirringthe orange mixture stirred at RT for 16 h
  4. customThe layers were separated
  5. extractionthe aqueous extracted with EtOAc (25 mL)
  6. washThe combined organics were washed with brine (25 mL)
  7. dry with materialdried (Na2SO4)
  8. filtrationfiltered
  9. concentrationconcentrated in vacuo
  10. customto leave an orange-red oil
  11. customRecrystallisation from cyclohexane

출처 및 근거

ORD 기록
ord-c5b3e10081de42779bbc011f6fcf71d8
출처 데이터셋
uspto-grants-2014_09
특허 번호
US08835431B2

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