Phenylhydrazine → HCID 58072343, compound

HRID 1805639Notes

Reaction equation

HRID 1805639 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-a2a5b7c588ac4664bb2ab9ce490470f4
Source dataset
uspto-grants-2013_01
Patent number
US08354411B2

Reaction notes

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