申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0111949A1
公开(公告)日:1984-06-27
Process for the preparation of a carboxylic anhydride by reacting under virtually water-free conditions an ester having the formula R1COOCH2R2 or an ether having the formula R3OR4 in which R1, R3 and R4 represents substituted or non-substituted hydrocarbon groups and R2 represents hydrogen or a substituted or non-substituted hydrocarbon group with carbon monoxide in the presence of a nickel catalyst, an iodide and/or bromide source and at least one co-promoter, characterized in that the reaction is carried out in the presence of a compound having the formula
in which X represents phosphorus, arsenic or antimony and Y oxygen, sulphur or selenium and a and b are 0 or 1 and R5 represents hydrogen or a substituted or non-substituted hydrocarbon group and R6 and R7 represent a substituted or non-substituted hydrocarbon group, or a and b are 0 and R6 and R7 form a heterocyclic group with X and R5 represents hydrogen or a substituted or non-substituted hydrocarbon group, or in the presence of a complex of a compound having the formula I with a hydrocarbon iodide or bromide, an acyl iodide or bromide or Hl or HBr.
在几乎无水的条件下,使式 R1COOCH2R2 的酯或式 R3OR4 的醚(其中 R1、R3 和 R4 代表取代或非取代的烃基,R2 代表氢或取代或非取代的烃基)与一氧化碳在镍催化剂、碘化源和/或溴化源以及至少一种助促进剂存在下反应制备羧酸酐的工艺,其特征在于该反应是在一种式如下的化合物存在下进行的
其中 X 代表磷、砷或锑,Y 代表氧、硫或硒,a 和 b 为 0 或 1,R5 代表氢或取代或未取代的烃基,R6 和 R7 代表取代或未取代的烃基、或 a 和 b 为 0,R6 和 R7 与 X 形成杂环基团,R5 代表氢或取代或非取代的烃基,或在具有式 I 的化合物与烃碘化物或溴化物、酰基碘化物或溴化物或 Hl 或 HBr 的络合物存在的情况下。