反应详情

温度

150 °C

In a 75 ml sealed tube, a stirred suspension of trans,trans dimethyl muconate (10.0 g, 58.8 mmol), two equivalents of methyl acrylate (10.6 ml, 117.6 mmol), neutral Al2O3 (300 mg of Aldrich 199974, 3 mass percent), and tert-butyl catechol (25 mg, 0.2 mol percent) in diglyme (20 ml, 2.9 M) is heated to 150° C. for 24 hours. After cooling to room temperature, the reaction mixture is filtered, transferred to a flask, and concentrated (0.5 M). Pd/C catalyst is added (856 mg (0.3 mol percent) of Johnson-Matthey 5 percent Pd/C #6) at room temperature. The flask is equipped with a reflux condenser, flitted gas dispersion tube, and internal T probe. Under N2 flow (190 ml/min) and stirring (190 rpm) the mixture is heated to reflux for 27 hours whereby trimethyl trimellitate (46 percent over 2 steps) is formed. Some trimethyl cyclohexane-1,2,4-tricarboxylate is also produced.

1. customIn a 75 ml sealed tube
2. temperatureAfter cooling to room temperature
3. filtrationthe reaction mixture is filtered
4. customtransferred to a flask
5. concentrationconcentrated (0.5 M)
6. additionPd/C catalyst is added (856 mg (0.3 mol percent) of Johnson-Matthey 5 percent Pd/C #6) at room temperature
7. customThe flask is equipped with a reflux condenser
8. temperatureis heated
9. temperatureto reflux for 27 hours whereby trimethyl trimellitate (46 percent over 2 steps)
10. customis formed