, where Y− is a non-coordinating anion (BF4−, ClO4−, BF4−) have been examined in telomerization reactions of buta-1,3-diene with representative nucleophiles. No reaction are observed for nickel complexes, due to their high reactivity versus nucleophiles. With palladium complexes, the reaction only occurs with alcohols and provides an increased selectivity for telomers with more than two diene units
The invention provides a process for the telomerization of acyclic olefins having at least two conjugated double bonds (I) or mixtures comprising such olefins by means of nucleophiles (II) using a palladium-carbene complex as catalyst.
申请人:QUANTUM CHEMICAL CORPORATION (a Virginia corp.)
公开号:EP0217407A2
公开(公告)日:1987-04-08
A method is disclosed for the production of esters by reaction of an allylic ether with carbon monoxide in the presence of a catalytically effective amount of a Group VIII noble metal catalyst and halide compound to obtain esters. The halide compound is present in an amount sufficient to prevent the catalyst from being converted into a Group VIII metal during the reaction. When the reaction is conducted in the presence of a quaternary ammonium salt the ester may be extracted by solvent extraction to minimize catalyst decomposition caused when extractive distillation is used to separate the ester.
本发明公开了一种通过烯丙基醚与一氧化碳在催化有效量的第 VIII 族贵金属催化剂和卤化物化合物存在下反应生成酯以获得酯的方法。 卤化物化合物的存在量足以防止催化剂在反应过程中转化为第 VIII 族金属。 当反应在季铵盐存在下进行时,可通过溶剂萃取法萃取酯,以尽量减少使用萃取蒸馏法分离酯时引起的催化剂分解。
BISPHOSPHITE AND PROCESS FOR PRODUCING ALDEHYDE COMPOUND WITH THE BISPHOSPHITE