Search results for "Pd catalysi"

showing 2 items of 2 documents

Synthesis of 1,3-bis(trimethylcyclam) and 1,3-bis(trimethylcyclen) substituted benzenes

2009

Pd-catalyzed amination of 1,3-dibromobenzene with N,N',N''-trimethylcyclam and N,N',N''-trimethylcyclen provided corresponding 1,3-bis(tetraazamacrocyclic) derivatives of benzene in 25-32% yields. The dependence of the products yields on the phosphine ligand applied (BINAP, DavePHOS) as well as on the stoichiometry of starting compounds was established. Scope and limitations for the synthesis of N-phenyl and N-(3-bromophenyl) derivatives of trimethylcyclam and trimethylcyclen were demonstrated.

010405 organic chemistryLigandPd catalysis[CHIM.ORGA]Chemical Sciences/Organic chemistryOrganic Chemistryamination[CHIM.ORGA] Chemical Sciences/Organic chemistry010402 general chemistry01 natural sciences0104 chemical sciencesAnalytical Chemistryaryl halideschemistry.chemical_compoundchemistrytetraazamacrocycles[ CHIM.ORGA ] Chemical Sciences/Organic chemistryOrganic chemistryBenzenePhosphineStoichiometryAminationComputingMilieux_MISCELLANEOUSBINAP
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Heterogeneous Sonogashira Coupling over Nanostructured SiliaCat Pd(0)

2012

Sol–gel entrapped catalyst SiliaCat Pd(0) heterogeneously mediates the Sonogoashira coupling of different aryl halides and phenylacetylene either under thermal conditions or, much more efficiently, under microwave irradiation, affording good conversions of coupled products. Leaching of valued Pd is limited, and the catalyst can be reused.

Renewable Energy Sustainability and the EnvironmentHeterogeneouGeneral Chemical EngineeringArylSonogashira couplingHalideSonogashira couplingPd catalysiGeneral ChemistryPhotochemistryCatalysisSiliaCatchemistry.chemical_compoundSol−gelchemistryPhenylacetyleneMicrowave irradiationEnvironmental ChemistryLeaching (metallurgy)Sol-gelACS Sustainable Chemistry & Engineering
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