Related Products of 32005-36-0, Chemistry is the science of change. But why do chemical reactions take place? Why do chemicals react with each other? The answer is in thermodynamics and kinetics.In a document type is Article, and a compound is mentioned, 32005-36-0, Bis(dibenzylideneacetone)palladium, introducing its new discovery.
Palladium-assisted formation of carbon-carbon bonds. 9. Synthesis of (2-alkenylaryl)- and indenylpalladium complexes
(o-Formylaryl)palladium complexes [Pd{C6H(CHO)-6-R3-2,3,4}X(N-N)] [R = OMe; X = Cl; N-N = bpy (2,2?-bipyridine) (1a), tmeda (N,N,N?,N?-tetramethylethylenediamine) (1b). R = H; X = Br; N-N = bpy (2a), tmeda (2b)] react with ylides PhCHqqPPh3, pyCHqqPPh3 (py = 2-pyridyl), or ClCHqqPPh3 to give the (o-alkenylaryl)palladium derivatives [Pd{C6-HCHqqCHPh-6-(OMe)3-2,3,4}Cl(N-N)] [N-N = bpy (3a), N-N = tmeda (3b)], [Pd{C6HCHqqCHpy-6-(OMe)3-2,3,4}Cl(N-N)] [N-N = bpy (4)], [Pd{C6H(E-CHqqCHCl)-6-(OMe)3-2,3,4}-Cl(tmeda)] (5), or [Pd(C6H4CHqqCHPh-2)Br(N-N)] [N-N = bpy (6a), N-N = tmeda (6b)]. The compounds 3a, 4, and 6a,b are obtained as mixtures of E and Z isomers, whereas the formation of 3b and 5 is stereoselective (E isomer). The reaction of the (o-acetylaryl)palladium complexes [Pd{C6HC(O)Me-6-(OMe)3-2,3,4}Cl(tmeda)] (7) and [Pd{C6H4(C(O)Me)-2}Br(bpy)] (8) with bases results in the formation of the 3-palladaindan-1-ones [Pd(kappa2-{C6HC(O)CH2-6-(OMe)3-2, 3,4})(tmeda)] (9) and [Pd(kappa2-{C6H4C(O)CH2-2}(bpy)] (10). Complexes 3b and 6a,b react with alkynes RCqqCR? to give indenylpalladium complexes [Pd{eta-C9HBn-1-R-2-R?-3-(OMe)3-5, 6,7}(tmeda)]TfO [Bn = benzyl, TfO = CF3SO3, R = R? = Me (11); R = C(O)Me, R? = H (12)] and [Pd{eta-C9H4Bn-1-R-2-R?-3}(N-N)]TfO [R = R? = H, N-N = bpy (13a), tmeda (13b); R = R? = Me, N-N = bpy (14a), tmeda (14b); R = R? = Et, N-N = bpy (15a), tmeda (15b); R = R? = Ph, N-N = bpy (16a), tmeda (16b); R = Ph, R? = H and R = H, R? = Ph, N-N = bpy (17a); R = H, R? = Ph, N-N = tmeda (17b); R = Ph, R? = Me, N-N = bpy (18a), N-N = tmeda (18b)]. Complex 3b reacts with Me2CqqCqqCH2, CS2, or MeNqqCqqS to give [Pd(eta3-CMe2C{C6H(E-CHqqCHPh)- 6-(OMe)3-2,3,4}CH2)(tmeda)]TfO (19), [Pd(S2C{C6H-(E-CHqqCHPh)-6-(OMe)3-2,3,4}) (tmeda)]TfO (20), or [Pd(SC(NMe){C6H(E-CHqqCHPh)-6-(OMe)3-2,3,4}) (tmeda)]TfO (21). The crystal structures of 12, 17b, and 18a have been determined; the hapticities of the indenyl five-membered rings are intermediate between eta3 and eta5.
Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Related Products of 32005-36-0. In my other articles, you can also check out more blogs about 32005-36-0
Reference£º
Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method