The present application relates to a process for preparing a dicarboxylic acid or dicarboxylic ester according to general formula (IV) R1OOC-(CH2)m-CH2CH2-(CH2)y-COOR4 (IV), comprising the steps of subjecting alkenoic acid or alkenoate of formula (II) R1OOC-(CH2)m-CH=CH-(CH2)x-H (II) to a metathesis reaction in the presence of a metathesis catalyst to form a longer-chain alkenoic acid or alkenoate of formula (III) R1OOC-(CH2)m-CH=CH-(CH2)y-H (III) where x
本申请涉及一种根据通式(IV)R1OOC-(CH2)m-CH2CH2-(CH2)y-COOR4(IV)制备二羧酸或二羧酸酯的方法,包括以下步骤:将通式(II)R1OOC-(CH2)m-CH=CH-(CH2)x-H(II)的烯酸或烯酸酯在存在烯烃交换催化剂的情况下进行交换反应,形成通式(III)R1OOC-(CH2)m-CH=CH-(CH2)y-H(III)的长链烯酸或烯酸酯,其中x
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