Potassium Hydroxide → HCID 86748985, compound

Participants

Reaction Steps

A mixture of 77.7 g of methyl 2-propenylpropane dicarboxylic acid diethyl ester, 123 g of potassium hydroxide and 625 ml of ethyl alcohol is heated at reflux for 53 hours. The reaction is cooled, concentrated in vacuo and the residue partitioned between water and diethyl ether. The aqueous layer is separated, made acidic with concentrated hydrochloric acid, saturated with solid sodium chloride and extracted with diethyl ether. The combined diethyl ether layers are dried and concentrated in vacuo to give 80 g of methyl 2-propenylpropane dicarboxylic acid as colorless crystals; MP 89°-90° C.

Provenance & Evidence