Extended knowledge of Bis(dibenzylideneacetone)palladium

32005-36-0, Name is Bis(dibenzylideneacetone)palladium, belongs to catalyst-palladium compound, is a common compound. Application In Synthesis of Bis(dibenzylideneacetone)palladiumIn an article, once mentioned the new application about 32005-36-0.

Diazadienes as control ligands in homogeneous catalysis XVIII. Palladacyclopentadienes and platinacyclopentadienes and the co-cyclotrimerization of various alkynes

Bis(dibenzylidene acetone)palladium reacts readily with N-aryl diazadienes (dad = ArN=CRCR=NAr) and two moles of dialkyl acetylenedicarboxylates EC<*>CE (E = COOR) to form the palladacyclopentadienes (dad)PdCE=CECE=CE (2a-h).With a propiolic ester HC<*>CE the corresponding complex (dad)PdCH=CECE=CH 3 is also formed in small yield.An eta2-alkyne complex 4 is obtained from the very bulky dad tBuN=CHCH=NtBu.The platinacyclopentadiene analogues of 2, (dad) (5) have been prepared, but unlike the others are inactive in catalysis.The acetylenic diesters readily undergo cyclotrimerization with 2 as catalyst.Depending on the nature of the substituents, numerous alkynes R’C<*>CR” undergo a catalytic cyclo-cotrimerization with two moles of the diester EC<*>CE to form a number of interestingly substituted benzenes.In the case of propargylic alcohols benzolactones are formed via a transesterification reaction during the catalysis.For phenylacetylene and EC<*>CE not only the corresponding biphenyl derivative 8 but also the linear Z and E 1 : 2-addition products have been isolated.

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Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method