32005-36-0, Name is Bis(dibenzylideneacetone)palladium, belongs to catalyst-palladium compound, is a common compound. Quality Control of Bis(dibenzylideneacetone)palladiumIn an article, once mentioned the new application about 32005-36-0.
The cyclooligomerisation of 3,3-dimethylcyclopropene (1) with phosphane-free palladium(0) catalysts, e.g. bis(1,5-cyclooctadiene)palladium, bis(dibenzylideneacetone)palladium, or a catalyst prepared “in situ” from palladium acetylacetonate and ethoxydiethylaluminium, leads to the trans-tricyclohexane derivative 2 and to three isomeric tetrakishomocyclooctatetraene compounds (4) <4a (anti,syn,anti); 4b (anti,anti,anti); 4c (possibly syn,anti,anti)>.In contrast, a (tri-sec-alkylphosphane)palladium(0) catalyst (Pd/P = 1:1) cyclotrimerises 1 in aromatic hydrocarbons to give the trans-?-trishomobenzene derivative 3 in over 90percent yield.The cyclooligomerisation of 1 using other triorgano-phosphane or -phosphite/palladium(0) catalysts leads to a mixture of products.Besides 2, 3, and 4 a second cyclotrimer of 1 (5) and higher oligomers of 1 are produced.The cyclotrimerisation of 1 to 3 is also influenced by the Pd/phosphane ratio and the solvent used.
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Reference：
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method