反应详情

The diethyl benzylmethylmalonate (75 g) was combined with 300 ml of ethanol and a solution of 100 g potassium hydroxide in 300 ml of water and heated to a gentle reflux for 5 hours. After cooling, the mixture was extracted with diethyl ether (2×300 ml). The aqueous phase was then acidified with 120 ml concentrated hydrochloric acid, and extracted with diethyl ether (3×300 ml). The combined organic extracts were dried over magnesium sulfate, filtered and concentrated to yield 49.2 g of benzylmethylmalonic acid as a yellow solid (83% yield).

1. temperaturea gentle reflux for 5 hours
2. temperatureAfter cooling
3. extractionthe mixture was extracted with diethyl ether (2×300 ml)
4. extractionextracted with diethyl ether (3×300 ml)
5. dry with materialThe combined organic extracts were dried over magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated