4-[4-(4-Bromophenoxy)phenyl]-4-oxobut-2-enoic acid 、 4-[4-(4-Methylphenoxy)phenyl]-4-oxobut-2-enoic acid 以to give 6.00 g of ethyl 3-[4-(4-bromophenoxy)benzoyl]acrylate in the form of an oil的产率得到Ethyl 4-[4-(4-bromophenoxy)phenyl]-4-oxobut-2-enoate
Novel compounds having the general formula ##STR1## wherein X is hydrogen or halogen, Y is hydrogen, halogen, methoxy or alkyl having 1 to 3 carbon atoms, Z is hydrogen, alkylcarbonyl having 2 to 6 carbon atoms or benzoyl, and R is hydrogen, alkali metal or alkyl having 1 to 5 carbon atoms, are disclosed. These compounds exhibit excellent hypolipidemic activity and little or no side effect.