Phenylhydrazine → HCID 58072238, compound

HRID 1624741Notes

Reaction equation

HRID 1624741 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[N:8]1[CH:13]=[CH:12][C:11](=[O:14])[C:10]([C:15](=O)[CH:16]=[CH:17][N:18](C)C)=[N:9]1.[C:22]1([NH:28]N)[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1>CO>[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[N:8]1[CH:13]=[CH:12][C:11](=[O:14])[C:10]([C:15]2[N:28]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=3)[N:18]=[CH:17][CH:16]=2)=[N:9]1

Participants

4

Reactant 2

HCID 7516PhenylhydrazineHCID 66710594HCID 66710594, compound

Product 1

HCID 58072238HCID 58072238, compoundYield 8.2%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

To a solution of 1-(2-chlorophenyl)-3-[3-(dimethylamino)prop-2-enoyl]pyridazin-4(1H)-one (crude, 636 mg, 2.10 mmol) in 20 mL of methanol was added phenylhydrazine (907 mg, 8.40 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-chlorophenyl)-3-(1-phenyl-1H-pyrazol-5-yl)pyridazin-4(1H)-one (60 mg, 8% for two steps) as a red gel.

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-64f119137e3c4b43b02bd12014619c7c
Source dataset
uspto-grants-2014_07
Patent number
US08778944B2

Reaction notes

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