Ethanol → 3-(1-[2-(trimethylsilyl)ethoxy]methyl-1H-pyrazol-4-yl)benzonitrile

HRID 1426555Notes

Reaction equation

HRID 1426555 reaction equation
CC1(C)C(C)(C)OB([C:9]2[CH:10]=[N:11][N:12]([CH2:14][O:15][CH2:16][CH2:17][Si:18]([CH3:21])([CH3:20])[CH3:19])[CH:13]=2)O1.Br[C:24]1[CH:25]=[C:26]([CH:29]=[CH:30][CH:31]=1)[C:27]#[N:28].C1(C)C=CC=CC=1.C(O)C.C(=O)([O-])[O-].[Na+].[Na+].O>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[CH3:21][Si:18]([CH3:19])([CH3:20])[CH2:17][CH2:16][O:15][CH2:14][N:12]1[CH:13]=[C:9]([C:24]2[CH:25]=[C:26]([CH:29]=[CH:30][CH:31]=2)[C:27]#[N:28])[CH:10]=[N:11]1

Participants

8

Reactant 6

HCID 702EthanolHCID 962WaterHCID 1140TolueneHCID 10340Sodium CarbonateHCID 233813-BromobenzonitrileHCID 574776664-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazole

Product 1

HCID 574776673-(1-[2-(trimethylsilyl)ethoxy]methyl-1H-pyrazol-4-yl)benzonitrile

Reagents, catalysts & solvents 1

HCID 178418397HCID 178418397, compoundCatalyst

Conditions

Temperature
80 °C

Procedure

A mixture of 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-[2-(trimethylsilyl)ethoxy]methyl-1H-pyrazole (150.0 mg, 0.0004625 mol) and 3-bromobenzonitrile (0.10 g, 0.00056 mol) in toluene (2.0 mL, 0.019 mol) and ethanol (0.3 mL, 0.005 mol) was treated with sodium carbonate (98 mg, 0.00092 mol) in water (0.5 mL, 0.03 mol). The mixture was degassed by bubbling nitrogen. Tetrakis(triphenylphosphine)palladium(0) (53 mg, 0.000046 mol) was added and nitrogen was bubbled for 3 min. The reaction was heated in a microwave at 80° C. for 30 min, then allowed to cool to rt and taken up in water and ethyl acetate. The organic layer was dried over MgSO4, filtered and concentrated to give a crude product, which was purified by FCC on silica gel, eluting with EtOAc/Hexanes (1:5) to give 3-(1-[2-(trimethylsilyl)ethoxy]methyl-1H-pyrazol-4-yl)benzonitrile, as an oil, LC/MS (M+H)+: 300.

Workup

  1. customThe mixture was degassed
  2. customby bubbling nitrogen
  3. customnitrogen was bubbled for 3 min
  4. temperatureto cool to rt
  5. dry with materialThe organic layer was dried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customto give a crude product, which
  9. customwas purified by FCC on silica gel
  10. washeluting with EtOAc/Hexanes (1:5)

Sources & evidence

ORD record
ord-2d3582fcd15c429ea359eca5954a404a
Source dataset
uspto-grants-2015_01
Patent number
US08933086B2

Reaction notes

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