Triethylamine → ethyl 2-(5-acetamido-3-phenyl-4-(phenylethynyl)-1H-pyrazol-1-yl)acetate

HRID 588621Notes

Reaction equation

HRID 588621 reaction equation
[C:1]([NH:4][C:5]1[N:9]([CH2:10][C:11]([O:13][CH2:14][CH3:15])=[O:12])[N:8]=[C:7]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[C:6]=1I)(=[O:3])[CH3:2].[C:23]1([C:29]#[CH:30])[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.C(N(CC)CC)C>[Cu](I)I.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.CN(C=O)C>[C:1]([NH:4][C:5]1[N:9]([CH2:10][C:11]([O:13][CH2:14][CH3:15])=[O:12])[N:8]=[C:7]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[C:6]=1[C:30]#[C:29][C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)(=[O:3])[CH3:2]

Participants

7

Reactant 3

HCID 8471TriethylamineHCID 10821PhenylacetyleneHCID 86717317ethyl 2-(5-acetamido-4-iodo-3-phenyl-1H-pyrazol-1-yl)acetate

Product 1

HCID 70983078ethyl 2-(5-acetamido-3-phenyl-4-(phenylethynyl)-1H-pyrazol-1-yl)acetateYield 78.3%

Reagents, catalysts & solvents 3

HCID 83717Copper iodideCatalystHCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolvent

Conditions

Temperature
90 °C

Procedure

Nitrogen was bubbled through a mixture of ethyl 2-(5-acetamido-4-iodo-3-phenyl-pyrazol-1-yl)acetate (34.95 g, 84.58 mmol), phenyl acetylene (18.6 mL, 169.16 mmol), triethylamine (300 mL) and DMF (120 mL) for 1.5 h. Copper iodide (1.61 g, 8.46 mmol) and bis(triphenylphosphine)palladium(II) dichloride (3 g, 4.23 mmol) were added and the reaction mixture was stirred at 90° C. under nitrogen for 2 h. The reaction mixture was concentrated in vacuo, and the residue was co-evaporated with toluene to remove excess DMF. The residue was diluted with ethyl acetate (300 mL) and washed with water (2×100 mL). The organic phase was filtered through celite, washed with water and brine, dried (MgSO4), filtered and concentrated in vacuo. The residue was triturated from ethyl acetate, yielding the title compound as a solid (25.67 g).

Workup

  1. concentrationThe reaction mixture was concentrated in vacuo
  2. customto remove excess DMF
  3. additionThe residue was diluted with ethyl acetate (300 mL)
  4. washwashed with water (2×100 mL)
  5. filtrationThe organic phase was filtered through celite
  6. washwashed with water and brine
  7. dry with materialdried (MgSO4)
  8. filtrationfiltered
  9. concentrationconcentrated in vacuo
  10. customThe residue was triturated from ethyl acetate

Sources & evidence

ORD record
ord-c6dc490a49f347789f5834fdd1ef46eb
Source dataset
uspto-grants-2016_01
Patent number
US09227976B2

Reaction notes

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