反应详情

温度

80 °C

A mixture of 2-bromo-4-chloro-1-methoxybenzene (1 g, 4.5 mmol), CuI (43 mg, 0.23 mmol), Pd(PPh3)2Cl2 (0.16 g, 0.23 mmol) in NEt3 (10 mL) was degassed, Then ethynyltrimethylsilane (0.5 g, 5 mmol) was added to the solution, the mixture was stirred at 80° C. for 6 hours. Then the mixture was cooled to 25° C., and added to H2O (50 mL). The mixture was extracted with ethyl acetate and washed with brine, dried over Na2SO4. After the combined organic layers were concentrated, the resulting residue was purified using prep-TLC (petroleum ether:EtOAc=10:1) to provide the product of ((5-chloro-2-methoxyphenyl)ethynyl)trimethylsilane (1 g, yield: 90%). 1H-NMR (CDCl3, 400 MHz) δ 7.40 (s, 1H), 7.21˜7.23 (m, 1H), 6.76˜6.78 (d, J=9.2 Hz, 1H), 3.86 (s, 3H), 0.26 (s, 9H). MS (M+H)+: 239/241

1. customwas degassed
2. temperatureThen the mixture was cooled to 25° C.
3. extractionThe mixture was extracted with ethyl acetate
4. washwashed with brine
5. dry with materialdried over Na2SO4
6. concentrationAfter the combined organic layers were concentrated
7. customthe resulting residue was purified