Palladacycles imine-derived

Imine-derived dinuclear palladacycles being ligated by amido or dialkyldithiocarbamato ligands show liquid crystal behavior and nematic smectic A and smectic G phases. " Other derivatives being OH-, hydroxo-amido-, amido-thiolato, or amido-carbxylato-bridged have also been prepared. The solution behavior, kinetics and mechanism of the acid-catalyzed cyclopalladation of imines, that is, A-benzylidenebenzylamines, -anilines, and -propylamine with Pd(OAc)2 in acetic acid has been studied. G-H electrophilic bond activation occurs to produce different types of metallacycles. 

Other stable and efficient catalysts for the Heck reaction are pyrazole- and benzothia-zole-based palladacycles. They are capable of promoting Barbier-type reactions. Note that palladacycles derived from aromatic imines decompose to form metallic Pd as the active species. ... 

Many other palladacycles derived from imines have been reported, and their reactions with diphosphines have been treated extensively their hydrolysis in the presence of bromide and bipy or PPh3 giving o// o-formylaryl complexes has also received attention. ... 

Ferrocenylimines derived from benzoylferrocene were synthesized and cyclopalladated by Bosque et The cr(GH) bonds in ferrocenyl- and bis(ferrocenyl)imines were activated in cyclopalladation reactions. Depending on the imine, five- and six-membered palladacycles were obtained. Bosque and Lopez also studied the cyclopalladation of mono- and bidentate primary ferrocenylimines. Mak / /. studied the cyclopalladation of ferrocenylimines in which the nitrogen of the imine is also substituted with a cyclic ether. Enantiopure bis(//-acetato)-bridged dimers were obtained. The insertion of diphenylacetylene was also investigated. 

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