ChemInform Abstract: Synthesis of Novel Dendritic 2,2′-Bipyridine Ligands and Their Application to Lewis Acid Catalyzed Diels—Alder and Three-Component Condensation Reactions

Autor:	Masato Kujime, Takahito Muraki, Ken-ichi Fujita
Rok vydání:	2008
Předmět:	chemistry.chemical_classification chemistry.chemical_compound chemistry Aryl Polymer chemistry Ether General Medicine Lewis acids and bases Bridged compounds Condensation reaction 2 2'-Bipyridine Dichloromethane Catalysis
Zdroj:	ChemInform. 39
ISSN:	1522-2667 0931-7597
Popis:	A series of dendritic ligands with a 2,2‘-bipyridine core was synthesized through the coupling of 4,4‘-dihydroxy-2,2‘-bipyridine with poly(aryl ether) dendrons. The corresponding dendritic Cu(OTf)2 catalysts were used for Diels−Alder and three-component condensation reactions. The dendritic Cu(OTf)2-catalyzed Diels−Alder reaction proceeded smoothly, and these dendritic catalysts could be recycled without deactivation by reprecipitation. Three-component condensation reactions such as Mannich-type reactions also proceeded not only in dichloromethane but also in water. Furthermore, a positive dendritic effect on chemical yields was observed in both Diels−Alder reactions and aqueous-media three-component condensation reactions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::56784136ad954f99f585064e613256df https://doi.org/10.1002/chin.200808057 Zobrazit plný text záznamu Plný text