反应详情

To a three neck flask (1000 mL), 50 g of methyl 2-o-tolylacetate and 600 mg of toluene were added, and then 54.3 g of sodium methoxide was further added with stiffing. The mixture was cooled with an ice-water bath to less than 10° C., and then a mixture of methyl formate (65 mL) and toluene (50 mL) was dripped. After that, the ice-water bath was removed and the temperature was raised slowly to room temperature. The solution was allowed to react with stirring for 12 hrs, and then dumped into 1000 mL of water, shaken, standed for demix. The organic layer was extracted with 500 mL of water twice. The water layer was combined, acidized with 6M hydrochloric acid to pH value of 4-5, extracted with ethyl acetate, dried with anhydrous magnesium sulfate, and distilled under vacuum condition to yield 55.9 g of light red oily product with a yield of 95%.

1. temperatureThe mixture was cooled with an ice-water bath to less than 10° C.
2. customAfter that, the ice-water bath was removed
3. customto react
4. stirringshaken
5. extractionThe organic layer was extracted with 500 mL of water twice
6. extractionextracted with ethyl acetate
7. dry with materialdried with anhydrous magnesium sulfate
8. distillationdistilled under vacuum condition