Trimethylsilylacetylene → 2,2,2-Trifluoro-N-{2-fluoro-5-[(trimethylsilyl)ethynyl]phenyl}acetamide

HRID 1157574Notes

Reaction equation

HRID 1157574 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]([F:15])=[C:6]([NH:8][C:9](=[O:14])[C:10]([F:13])([F:12])[F:11])[CH:7]=1.[CH3:16][Si:17]([C:20]#[CH:21])([CH3:19])[CH3:18]>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.[Cu]I.C1COCC1>[F:11][C:10]([F:13])([F:12])[C:9]([NH:8][C:6]1[CH:7]=[C:2]([C:21]#[C:20][Si:17]([CH3:19])([CH3:18])[CH3:16])[CH:3]=[CH:4][C:5]=1[F:15])=[O:14]

Participants

6

Reactant 2

HCID 66111TrimethylsilylacetyleneHCID 59511409N-(5-bromo-2-fluorophenyl)-2,2,2-trifluoroacetamide

Product 1

HCID 595113832,2,2-Trifluoro-N-{2-fluoro-5-[(trimethylsilyl)ethynyl]phenyl}acetamideYield 89%

Reagents, catalysts & solvents 3

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 178418476HCID 178418476, compoundCatalystHCID 8028TetrahydrofuranSolvent

Conditions

Temperature
60 °C

Procedure

To an oven-dried flask under N2 was added N-(5-bromo-2-fluorophenyl)-2,2,2-trifluoroacetamide (5.6 g, 20 mmol), anhydrous degassed THF (200 mL), dichlorobis(triphenylphosphine)palladium(II) (1.7 g, 2.5 mmol), copper(I) iodide (0.28 g, 1.5 mmol), and trimethylsilylacetylene (7.0 mL, 50 mmol). Next, TEA (27 mL, 197 mmol) was added dropwise and the resulting mixture was heated at 60° C. overnight. The crude reaction mixture was adsorbed to silica gel and purified by column chromatography to afford the desired product (5.3 g, 89%) as an off white solid. ES-LC/MS m/z=302 [M−H]−.

Workup

  1. customThe crude reaction mixture
  2. custompurified by column chromatography

Sources & evidence

ORD record
ord-2bf5e49314df42a89302567b4e61fa5c
Source dataset
uspto-grants-2010_10
Patent number
US07807673B2

Reaction notes

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