Diethyl Malonate → HCID 54537439, compound

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Reaction Steps

108.5 g of malonic acid diethyl ester are added dropwise, at 50°, to a sodium ethylate solution freshly prepared from 15.6 g of sodium and 750 ml of ethanol. The mixture is kept at the above temperature for 2.5 hours and 220 g of p-toluenesulphonic acid 3-(4-chlorophenyl)-propyl ester are then added dropwise. After the addition, the mixture is stirred at 50° for 6 hours, 800 ml of water are then added and the mixture is extracted 3 times with a total of 1 liter of diethyl ether. The combined organic phases are dried over sodium sulphate, the solvent is evaporated off and the residue is distilled. 105.6 g of 3-(4-chlorophenyl)-propylmalonic acid diethyl ester of b.p. 145°-155° under 0.01 mm Hg (1.33 Pa) are obtained.

Provenance & Evidence