Phenylhydrazine → HCID 46219455, compound

HRID 1895265Notes

Reaction equation

HRID 1895265 reaction equation
C[N:2](C)[CH:3]=[CH:4][C:5]([C:7]1[C:12](=[O:13])[CH:11]=[CH:10][N:9]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)[N:8]=1)=O.[C:21]1([NH:27]N)[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1>CO>[C:14]1([N:9]2[CH:10]=[CH:11][C:12](=[O:13])[C:7]([C:5]3[N:27]([C:21]4[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=4)[N:2]=[CH:3][CH:4]=3)=[N:8]2)[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1

Participants

4

Reactant 2

HCID 7516PhenylhydrazineHCID 66710880HCID 66710880, compound

Product 1

HCID 46219455HCID 46219455, compoundYield 7%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of 3-[3-(dimethylamino)prop-2-enoyl]-1-phenylpyridazin-4(1H)-one (crude 620 mg, 2.30 mmol) in 20 mL of methanol was added phenylhydrazine (996 mg, 9.22 mmol). The mixture was refluxed for 4 h and concentrated. The residue was dissolved in dichloromethane (20 mL), washed with 1N HCl aqueous solution and brine, dried over Na2SO4, and concentrated under reduced pressure. The residue was purified by prep-HPLC to give 1-phenyl-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one (50 mg, yield 7% for two steps) as a yellow solid.

Workup

  1. temperatureThe mixture was refluxed for 4 h
  2. concentrationconcentrated
  3. dissolutionThe residue was dissolved in dichloromethane (20 mL)
  4. washwashed with 1N HCl aqueous solution and brine
  5. dry with materialdried over Na2SO4
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by prep-HPLC

Sources & evidence

ORD record
ord-95899f5a48464d37b7a425859973df56
Source dataset
uspto-grants-2013_08
Patent number
US08513251B2

Reaction notes

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