反应详情

温度

80 °C

A mixture of methyl 4-cyclobutyl-5-iodo-2-methylbenzoate (compound 152.3, 1.32 g, 4 mmol), trimethylsilylacetylene (663 μl, 4.8 mmol), Pd(PPh3)2Cl2 (85 mg, 0.12 mmol) and copper iodide (CuI, 46 mg, 0.24 mmol) in THF (8 ml) and triethylamine (2 ml) was degassed and then heated to 80° C. for 1.5 hours under nitrogen. After cooling to ambient temperature, the reaction was filtered through celite and concentrated. The residue was dissolved in ethyl acetate (EtOAc), washed with brine, dried over MgSO4 and concentrated. The residue was purified by flash chromatography (SiO2; 3% EtOAc in Hexane) to give 1.17 g (97%) of the title compound as a liquid. 1H NMR (400 MHz, CDCl3) δ 8.01 (s, 1H), 7.15 (s, 1H), 4.01-3.75 (m, 4H), 2.63 (s, 3H), 2.54-2.31 (m, 2H), 2.27-2.12 (m, 2H), 2.12-1.98 (m, 1H), 1.94-1.80 (m, 1H), 0.28 (s, 9H).

1. customwas degassed
2. temperatureAfter cooling to ambient temperature
3. filtrationthe reaction was filtered through celite
4. concentrationconcentrated
5. dissolutionThe residue was dissolved in ethyl acetate (EtOAc)
6. washwashed with brine
7. dry with materialdried over MgSO4
8. concentrationconcentrated
9. customThe residue was purified by flash chromatography (SiO2; 3% EtOAc in Hexane)