Methylhydrazine → 1,3-dimethyl-4,5,6,7-tetrahydro-1H-indazol-4-one

HRID 569893

반응식

HRID 569893 반응식
[CH3:1][NH:2][NH2:3].[C:4]([CH:7]1[C:12](=[O:13])[CH2:11][CH2:10][CH2:9][C:8]1=O)(=O)[CH3:5]>CO>[CH3:1][N:2]1[C:8]2[CH2:9][CH2:10][CH2:11][C:12](=[O:13])[C:7]=2[C:4]([CH3:5])=[N:3]1

참가 물질

4

반응물 2

HCID 6061MethylhydrazineHCID 1381042-Acetyl-1,3-cyclohexanedione

생성물 1

HCID 141266791,3-dimethyl-4,5,6,7-tetrahydro-1H-indazol-4-one

시약·촉매·용매 1

HCID 887Methanol용매2회

실험 절차

A solution of 11 ml of methylhydrazine in 50 ml of methanol was added dropwise to an ice-cold solution of 30 grams of 2-acetyl-1,3-cyclohexanedione in 200 ml of methanol and the reaction mixture was heated at reflux for 90 minutes. The solvent was removed under reduced pressure and the residue was triturated in hexane and cooled to give a clammy tan solid. This crude product was recrystallized from a mixture of toluene and hexane to give 1,5,6,7-tetrahydro-1,3-dimethyl-4H-indazol-4-one as a yellow crystalline solid melting at about 82.5°-84° C.

후처리

  1. temperaturethe reaction mixture was heated
  2. temperatureat reflux for 90 minutes
  3. customThe solvent was removed under reduced pressure
  4. customthe residue was triturated in hexane
  5. temperaturecooled
  6. customto give a clammy tan solid
  7. customThis crude product was recrystallized from a mixture of toluene and hexane

출처 및 근거

ORD 기록
ord-79223b7c48f14055a84d4da905beee2c
출처 데이터셋
uspto-grants-1988_03
특허 번호
US04734429

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