In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 32005-36-0, name is Bis(dibenzylideneacetone)palladium, introducing its new discovery. Formula: C34H28O2Pd
Mono- and Dipalladated Derivatives of 2,5-Distyrylbenzene. Reactivity toward XyNC and Alkynes. Synthesis of Complexes with Indacenediide Ligands
The dinuclear complexes [C6H2{PdBr-(N^N)}2-1,4-((E)-CH=CHPh)2-2,5] (N^N = tbbpy = 4,4?-di-tert-butyl-2,2?-bipyridine (1a), tmeda = N,N,N?,N?-tetramethylethylenediamine (1b)) have been synthesized by oxidative addition of trans,trans-2,5-distyryl-2,4-dibromobenzene to 2 equiv of “[Pd(dba)2]” (dba = dibenzylideneacetone) in the presence of the N^N ligands. A similar reaction with N^N = bpy = 2,2?-bipyridine afforded the mononuclear complex [PdBr{C6H2(Br-4){((E)-CH=CHPh)2-2,5}(bpy)] (2). The reaction of 1a,b with PhC?CPh, MeC?CMe, and PhC?CMe in the presence of TlOTf or AgClO4 gave the dipalladated indacenediide complexes [(mu-eta,eta-C12H2Bn2-1,5-R4-2,3,6,7){Pd(N^N)}2](OTf)2 (Bn = benzyl, R = Ph, N^N = tbbpy (3a), tmeda (3b); R = Me, N^N = tbbpy (4a), tmeda (4b)) and [(mu-eta,eta-C12H2Bn2-1,5-Ph2-2,6-Me2-3,7){Pd(N^N)}2](A)2 (N^N = tbbpy, A = OTf (5a), ClO4 (5a?); N^N = tmeda, A = OTf (5b)). The reactions of 2 with the same alkynes afforded the indenyl complexes [Pd(eta-C9H2Bn-1-R2-2,3-((E)-CH=CHPh)-5-Br-6)(bpy)](A) (R = Ph, A = OTf (6), ClO4 (6?); R = Me, A = OTf (7)) and [Pd(eta-C9H2Bn-1-Ph-2-Me-3-((E)-CH=CHPh)-5-Br-6)(bpy)]OTf (8). By reaction of either 1a or 1b with XyNC (Xy = 2,6-dimethylphenyl) the dinuclear complex [C6H2{C(=NXy){PdBr(CNXy)2}2-1,4-((E)-CH=CHPh)2-2,5] (9) was obtained, while the oxidative addition of trans,trans-2,5-distyryl-2,4-dibromobenzene to [Pd(dba)2] in the presence of 8 equiv of XyNC afforded the dinuclear complexes [C6H2{C(=NXy){C(=NXy)}2{PdBr(CNXy)}}2-1,4-((E)-CH=CHPh)2-2,5] (10, 10?) as a mixture of isomers (1:0.3 ratio) which are in slow exchange in solution, as shown by an EXSY spectrum. The crystal structures of a-3a¡¤7CDCl3, s-3b¡¤CH2Cl2, a-5a?¡¤4CH2Cl2, 6, and 8 have been determined by X-ray diffraction studies.
We¡¯ll also look at important developments in the pharmaceutical industry because understanding organic chemistry is important in understanding health, medicine, the role of 32005-36-0, and how the biochemistry of the body works.Formula: C34H28O2Pd
Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method