反应详情

温度

45 °C

Methoxy-p-benzoquinone (0.50 g) and 2,3-dimethyl-1,3-butadiene (0.63 ml) were added to 23.0 mL of glacial acetic acid. The mixture was heated at 45° C. for 18.5 hrs. A chromic acid solution consisting of 1.85 g of Na2Cr2O7.2H2O, 1.16 mL water, and 0.09 mL of concentrated H2SO4 was then added, and the temperature was kept at approximately 67° C. for 1 hour. The product was precipitated by the addition of ice water, washed several times with cold water, and then dried over P2O5. A 71% yield (0.557 g) of 2-methoxy-6,7-dimethyl-1,4-naphthoquinone was obtained.

1. additionwas then added
2. customThe product was precipitated by the addition of ice water
3. washwashed several times with cold water
4. dry with materialdried over P2O5