4-[4-(4-Methoxyphenoxy)phenyl]-4-oxobut-2-enoic acid 、 4-[4-(4-Methylphenoxy)phenyl]-4-oxobut-2-enoic acid 以to give 5.06 g of ethyl 3-[4-(4-methoxyphenoxy)benzoyl]-acrylate in the form of an oil的产率得到Ethyl 4-[4-(4-methoxyphenoxy)phenyl]-4-oxobut-2-enoate