Imidazole → HCID 86594249, compound

HRID 489928Notes

Reaction equation

HRID 489928 reaction equation
[OH:1][CH2:2][CH2:3][NH:4][N:5]=[C:6]([C:14]1[CH:19]=[CH:18][C:17]([F:20])=[CH:16][CH:15]=1)[CH2:7][C:8]1[CH:13]=[CH:12][N:11]=[CH:10][CH:9]=1.[CH3:21][C:22]([Si:25](Cl)([CH3:27])[CH3:26])([CH3:24])[CH3:23].N1C=CN=C1.O>CN(C=O)C>[CH3:21][C:22]([Si:25]([CH3:27])([CH3:26])[O:1][CH2:2][CH2:3][NH:4][N:5]=[C:6]([C:14]1[CH:15]=[CH:16][C:17]([F:20])=[CH:18][CH:19]=1)[CH2:7][C:8]1[CH:13]=[CH:12][N:11]=[CH:10][CH:9]=1)([CH3:24])[CH3:23]

Participants

6

Reactant 4

HCID 795ImidazoleHCID 962WaterHCID 28928tert-Butyldimethylsilyl chlorideHCID 73455842HCID 73455842, compound

Product 1

HCID 86594249HCID 86594249, compoundYield 98%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of the 1-(4-fluorophenyl)-2-(4-pyridinyl)ethanone (2-hydroxyethyl)hydrazone prepared in step 1 (2.73 g, 0.01 mol) and (1,1-dimethylethyl)dimethylsilyl chloride (1.5 g, 0.01 mol) in 25 mL of DMF was added imidazole portionwise. The reaction mixture was stirred at room temperature overnight. Water was added and extracted with ethyl acetate, the organic layer was washed with water, washed with brine, dried over magnesium sulfate and filtered. The filtrate was concentrated to give 3.8 g of crude product, 1-(4-fluorophenyl)-2-(4-pyridinyl)ethanone [2-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]hydrazone, as a yellow oil that was used in the next step without further purification. Step 3: 5-cyclopropyl-1-[2-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]-3,4-diphenyl-1H-pyrazole

Workup

  1. extractionextracted with ethyl acetate
  2. washthe organic layer was washed with water
  3. washwashed with brine
  4. dry with materialdried over magnesium sulfate
  5. filtrationfiltered
  6. concentrationThe filtrate was concentrated

Sources & evidence

ORD record
ord-f9b847abba7147de90c7f2d29a1d11f3
Source dataset
uspto-grants-2005_12
Patent number
US06979686B1

Reaction notes

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