反应详情

Ethynyltrimethylsilane (4.0 mL, 28.9 mmol) was added to a mixture of ACN (100 mL), TEA (25 mL), 2-(3-bromophenyl)-2-methylpropionitrile (5.0 g, 22.3 mmol), (Ph3P)2PdCl2 (780 mg, 1.11 mmol) and copper(I) iodide (130 mg, 0.68 mmol) under nitrogen atmosphere. The reaction mixture was refluxed for 3 hours, cooled to ambient temperature, concentrated to a black residue and filtered through silica gel with 20% ethyl acetate in hexane. The filtrate was concentrated to a red oil and chromatographed on silica gel with 2% ethyl acetate in hexane. Obtained 2-methyl-2-(3-trimethylsilanylethynylphenyl)-propionitrile (4.00 g, 74%) as an orange oil. 1H NMR (DMSO-d6) δ: 0.24 (s, 9H), 1.69 (s, 6H), 7.43 (m, 2H), 7.56 (m, 2H).

1. temperatureThe reaction mixture was refluxed for 3 hours
2. concentrationconcentrated to a black residue
3. filtrationfiltered through silica gel with 20% ethyl acetate in hexane
4. concentrationThe filtrate was concentrated to a red oil
5. customchromatographed on silica gel with 2% ethyl acetate in hexane