Ethylene Glycol → HCID 13478167, compound

Participants

Reaction Steps

5.0 g of 6-acetyl-3,4-dihydro-1,4,4-trimethyl-2(1H)-quinolinone were dissolved in 200 ml of benzene and, after the addition of 2.1 g of ethylene glycol and a few crystals of p-toluenesulphonic acid, the mixture was boiled under a water separator for 5 hours. After cooling, the mixture was diluted with ethyl acetate, washed with dilute sodium hydrogen carbonate solution, dried and evaporated. There were obtained 5.6 g of 3,4-dihydro-1,4,4-trimethyl-6-(2-methyl-1,3-dioxolan-2-yl)-2(1H)-quinolinone in the form of a colourless oil which solidified upon standing in a refrigerator; melting point 81°-83° C. This compound was used in the next step without further purification.

Provenance & Evidence