Phenylhydrazine → HCID 58072425, compound

HRID 2089914Notes

Reaction equation

HRID 2089914 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][C:15]=2[F:20])[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:15]1[CH:16]=[CH:17][CH:18]=[CH:19][C:14]=1[N:9]1[CH:10]=[CH:11][C:12](=[O:13])[C:7]([C:5]2[N:28]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=3)[N:2]=[CH:3][CH:4]=2)=[N:8]1

Participants

4

Reactant 2

HCID 7516PhenylhydrazineHCID 66710465HCID 66710465, compound

Product 1

HCID 58072425HCID 58072425, compoundYield 31%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of 3-[3-(dimethylamino)prop-2-enoyl]-1-(2-fluorophenyl)pyridazin-4(1H)-one (crude 776 mg, 2.70 mmol) in 20 mL of methanol was added phenylhydrazine (438 mg, 4.10 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-(2-fluorophenyl)-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one (278 mg, 31% 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-7324642d389649d1a1d3e76e3e69abc9
Source dataset
uspto-grants-2013_05
Patent number
US08435995B2

Reaction notes

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