Phenylhydrazine → HCID 58072343, compound

HRID 2089942Notes

Reaction equation

HRID 2089942 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:22]=[CH:21][C:17]([C:18]([NH2:20])=[O:19])=[CH:16][CH:15]=2)[N:8]=1)=O.[C:24]1([NH:30]N)[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1>CO>[O:13]=[C:12]1[CH:11]=[CH:10][N:9]([C:14]2[CH:22]=[CH:21][C:17]([C:18]([NH2:20])=[O:19])=[CH:16][CH:15]=2)[N:8]=[C:7]1[C:5]1[N:30]([C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[N:2]=[CH:3][CH:4]=1

Participants

4

Reactant 2

HCID 7516PhenylhydrazineHCID 66711108HCID 66711108, compound

Product 1

HCID 58072343HCID 58072343, compoundYield 6%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of 4-{3-[3-(dimethylamino)prop-2-enoyl]-4-oxopyridazin-1(4H)-yl}benzamide (crude 682 mg, 2.19 mmol) in 20 mL of methanol was added phenylhydrazine (946 mg, 8.76 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 4-[4-oxo-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-1(4H)-yl]benzamide (50 mg, 6% 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-49d711f49b62406380d4fe85956d9d10
Source dataset
uspto-grants-2013_05
Patent number
US08435995B2

Reaction notes

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