反应详情

温度

110 °C

Six 15 mL test tubes with screw threads were equipped with one 10×3 mm Teflon-coated stirring bar each and charged with CuI (9.6 mg, 0.050 mmol, 5.0 mol %), the ligand (in those cases where the ligand was a solid; 0.10 mmol), and K3PO4 (430 mg, 2.03 mmol). Each test tube was closed with an open-top screw cap fitted with a Teflon-lined silicon rubber septum, evacuated through a 21-gauge needle, and then backfilled with argon. Meanwhile, a stock solution of 5-iodo-m-xylene (2.16 mL, 15.0 mmol), N-methylformamide (1.06 mL, 18.1 mmol), and dodecane (internal GC standard, 0.68 mL) in toluene (15 mL) was prepared in a 25 mL pear-shaped flask under argon. To each test tube was added 1.28 mL of the stock solution containing 1.0 mmol of 5-iodo-m-xylene and 1.2 mmol of N-methylformamide, using a syringe followed by the ligand (in those cases where the ligand was a liquid; 0.10 mmol). The top of the septum was then covered with a dab of vacuum grease to seal the injection spot. The reaction mixtures in the test tubes were stirred in a 110±5° C. oil bath for 24 h. The test tubes were then allowed to reach room temperature, the screw caps were removed, and ethyl acetate (3 mL) was added. A 50–100 μL sample of the supernatant solution from each test tube was diluted with ethyl acetate (1 mL) and the resulting solutions were analyzed by GC. The results are reported in FIG. 20.

1. customEach test tube was closed with an open-top screw
2. customcap
3. customevacuated through a 21-gauge needle
4. customto seal the injection spot
5. customto reach room temperature
6. customthe screw caps were removed
7. additionethyl acetate (3 mL) was added
8. additionA 50–100 μL sample of the supernatant solution from each test tube was diluted with ethyl acetate (1 mL)