Phenylhydrazine → HCID 58072368, compound

HRID 2089915Notes

Reaction equation

HRID 2089915 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][C:17]([F:20])=[CH:16][CH:15]=2)[N:8]=1)=O.[C:22]1([NH:28]N)[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1>CO>[F:20][C:17]1[CH:18]=[CH:19][C:14]([N:9]2[CH:10]=[CH:11][C:12](=[O:13])[C:7]([C:5]3[N:28]([C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)[N:2]=[CH:3][CH:4]=3)=[N:8]2)=[CH:15][CH:16]=1

Participants

4

Reactant 2

HCID 7516PhenylhydrazineHCID 2744378HCID 2744378, compound

Product 1

HCID 58072368HCID 58072368, compoundYield 27%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of 3-[3-(dimethylamino)prop-2-enoyl]-1-(4-fluorophenyl)pyridazin-4(1H)-one (crude 840 mg, 2.93 mmol) in 20 mL of methanol was added phenylhydrazine (474 mg, 4.39 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-(4-fluorophenyl)-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one (260 mg, 27% for two steps) as a brown solid.

Workup

  1. temperaturewas 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-95ed46d35a754dff8963bcb9acd4e892
Source dataset
uspto-grants-2013_05
Patent number
US08435995B2

Reaction notes

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