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Hydrochloric Acid → 5-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxylic acid

HRID 1805189
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인쇄 미리보기

반응식

HRID 1805189 반응식
C([O:3][C:4]([C:6]1[C:10]([CH3:11])=[C:9]([C:12]2[CH:17]=[CH:16][C:15]([Cl:18])=[CH:14][CH:13]=2)[N:8]([C:19]2[CH:24]=[CH:23][C:22]([Cl:25])=[CH:21][C:20]=2[Cl:26])[N:7]=1)=[O:5])C.[OH-].[K+].Cl>CO>[Cl:18][C:15]1[CH:14]=[CH:13][C:12]([C:9]2[N:8]([C:19]3[CH:24]=[CH:23][C:22]([Cl:25])=[CH:21][C:20]=3[Cl:26])[N:7]=[C:6]([C:4]([OH:5])=[O:3])[C:10]=2[CH3:11])=[CH:17][CH:16]=1
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참가 물질

5

반응물 3

HCID 313Hydrochloric AcidHCID 14797Potassium HydroxideHCID 10938462Ethyl 5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxylate

생성물 1

HCID 15194215-(4-Chlorophenyl)-1-(2,4-dichlorophenyl)-4-methyl-1H-pyrazole-3-carboxylic acid수율 94.5%

시약·촉매·용매 1

HCID 887Methanol용매

반응 조건

온도
60 °C

실험 절차

To a solution of the ester 3a (1.0 g, 2.44 mmol) in methanol (25 mL) was added potassium hydroxide (1.0 g, 17.86 mmol) in one portion. The resulting mixture was heated at 60° C. for 4 h. The reaction mixture was then poured into ice water, and the pH of the mixture was adjusted to acidic with addition of 10% hydrochloric acid. The precipitate formed was collected by filtration, washed with water, and dried under vacuum to give carboxylic acid 4a (0.88 g, 94%) as a white solid.

후처리

  1. customThe precipitate formed
  2. filtrationwas collected by filtration
  3. washwashed with water
  4. customdried under vacuum

출처 및 근거

ORD 기록
ord-cbc20135648949aa9dd51e83482145d5
출처 데이터셋
uspto-grants-2013_01
DOI
10.6084/m9.figshare.5104873.v1
특허 번호
US08354442B2

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