Dimethylformamide dimethyl acetal → (4Z)-4-[(Dimethylamino)methylidene]-2,5-bis(2-fluorophenyl)-2,4-dihydro-3H-pyrazol-3-one

HRID 341044Notes

Reaction equation

HRID 341044 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[N:8]1[C:12](=[O:13])[CH2:11][C:10]([C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=2[F:20])=[N:9]1.CO[CH:23](OC)[N:24]([CH3:26])[CH3:25]>CO>[CH3:23][N:24](/[CH:26]=[C:11]1\[C:12](=[O:13])[N:8]([C:3]2[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=2[F:1])[N:9]=[C:10]\1[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=1[F:20])[CH3:25]

Participants

4

Reactant 2

HCID 78373Dimethylformamide dimethyl acetalHCID 671115152,5-bis(2-fluorophenyl)-2,4-dihydro-3H-pyrazol-3-one

Product 1

HCID 68153863(4Z)-4-[(Dimethylamino)methylidene]-2,5-bis(2-fluorophenyl)-2,4-dihydro-3H-pyrazol-3-one

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

2,5-Bis(2-fluorophenyl)-2,4-dihydro-3H-pyrazol-3-one (2.5 g, 8.1 mmol) was dissolved in methanol (3 mL), treated with N,N-dimethylformamide dimethylacetal (1.2 g, 9.7 mmol, 1.2 equiv) and placed into a preheated oil bath at 60° C. for 1 hour. The mixture was cooled to ambient temperature and concentrated in vacuo, providing the titled compound.

Workup

  1. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-0f899fbe189e45ce91ded73bf5c26587
Source dataset
uspto-grants-2014_11
Patent number
US08895580B2

Reaction notes

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