A process for preparing trans-.beta.-benzoylacrylic acid ester having the general formula (I): ##STR1## wherein R is alkyl group or aralkyl group, which comprises dealcoholizing .beta.-benzoyl-.alpha.-alkoxypropionic acid ester having the general formula (II): ##STR2## wherein R is above, in the presence of an acid catalyst to give trans-.beta.-benzoylacrylic acid ester having the general formula (I). According to the process of the present invention, the by-product (II) produced in the esterification reaction of .beta.-benzoylacrylic acid (III) with the alcohol (V) by the dehydration reaction can be converted into the compound (I) by the dealcoholization reaction in the presence of the acid catalyst and thus trans-.beta.-benzoylacrylic acid ester (I) with a high purity can be produced in an industrially advantageous manner.
一种制备具有通式(I)的反式-β-苯甲酰基
丙烯酸酯的方法,其中R为烷基或芳基烷基,包括在酸催化剂的存在下脱醇β-苯甲酰-α-烷氧基
丙酸酯,其通式为(II),其中R如上所述,以获得具有通式(I)的反式-β-苯甲酰基
丙烯酸酯。根据本发明的方法,可以通过存在酸催化剂的脱醇反应将在β-苯甲酰基
丙烯酸(III)与醇(V)脱
水反应的酯化反应中产生的副产物(II)转化为化合物(I),从而可以以工业上有利的方式制备高纯度的反式-β-苯甲酰基
丙烯酸酯(I)。