Trimethylsilylacetylene → 1-[(Trimethylsilyl)ethynyl]-3-(trifluoromethyl)benzene

HRID 59334

Reaction equation

I[C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([C:8]([F:11])([F:10])[F:9])[CH:3]=1.[C:12]([Si:14]([CH3:17])([CH3:16])[CH3:15])#[CH:13]>C(OCC)(=O)C.[Cu](I)I.[Pd](Cl)Cl.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[CH3:15][Si:14]([CH3:17])([CH3:16])[C:12]#[C:13][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([C:8]([F:11])([F:10])[F:9])[CH:3]=1

Participants

Conditions

Temperature: 55 °C

Procedure

To a solution of 1-iodo-3-(trifluoromethyl)benzene (1.0 g, 3.6 mmol) in ethyl acetate (20 mL) was added ethynyl(trimethyl)silane (0.540 g, 5.5 mmol), copper iodide (0.042 g, 0.22 mmol), bis(triphenylphosphine) palladium(II) chloride (0.129 g, 0.18 mmol) and TEA (2.2 mL, 14.7 mmol). The reaction mass stirred at 50-60° C. for 24 h. The reaction mass was quenched in water, extracted with ethyl acetate and concentrated to afford 0.500 g of desired product. 1H NMR (300 MHz, DMSO d6): δ 0.26 (s, 9H), 7.44 (t, J=7.8 Hz, 1H), 7.55 (d, J=7.8 Hz, 1H), 7.62 (d, J=7.2 Hz, 1H), 7.72 (s, 1H).

Workup

customThe reaction mass was quenched in water
extractionextracted with ethyl acetate
concentrationconcentrated

Sources & evidence

ORD record: ord-db091dd852e94dac8377a99e56e3cd33
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09439890B2

Linked notes

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