Solid-supported catalysts derived from homogeneous nickel(II) and palladium(II) non-symmetrical salen-type coordination complexes have been prepared and shown to be effective in the heterogeneous catalysis of carbon–carbon cross-coupling reactions. The nickel catalyst has been used in room-temperature Tamao–Kumada–Corriu reactions and the palladium catalyst in the Heck reaction at elevated temperatures. The complexes were prepared by improved methods and characterised by spectroscopic techniques. Comparisons between the solid-supported catalysts and their homogeneous analogues are reported. The single-crystal structure determination of the nickel and palladium complexes [M(salenac-OH)]
[M = Ni, Pd; salenac-OH = 9-(2′,4′-dihydroxyphenyl)-5,8-diaza-4-methylnona-2,4,8-trienato](2−)] is reported.
基于均相
镍(II)和
钯(II)非对称salen型配位复合物制备了固体支撑催化剂,并显示其在碳-碳交叉偶联反应的异相催化中具有良好的效果。
镍催化剂已用于室温下的Tamao–Kumada–Corriu反应,而
钯催化剂则在高温下用于Heck反应。这些复合物通过改进的方法制备,并通过光谱技术进行了表征。还报告了固体支撑催化剂与其均相类似物之间的比较。此外,还报告了
镍和
钯复合物的单晶结构测定 [M(salenac-OH)] [M = Ni, Pd; salenac-OH = 9-(2′,4′-二羟基苯)-5,8-二氮-4-甲基壬-2,4,8-
三烯酸](2−)。