Benzene ring assembly promoted by a camphor derived palladium complex

Autor:	Adelino M. Galvão, M. Fernanda N. N. Carvalho, Armando J. L. Pombeiro, Fernanda M.T. Almeida
Rok vydání:	2003
Předmět:	Organic Chemistry chemistry.chemical_element Ring (chemistry) Photochemistry Biochemistry Medicinal chemistry Catalysis Inorganic Chemistry chemistry.chemical_compound Camphor chemistry Materials Chemistry Molecule High activity Physical and Theoretical Chemistry Benzene Selectivity Palladium
Zdroj:	Journal of Organometallic Chemistry. 679:143-147
ISSN:	0022-328X
Popis:	Trans-[PdCl2L2] (1, L=3-NNMe2C10H14O), under mild reaction conditions, acts as a catalyst for the cyclic trimerization of alkynes. The best performance is achieved for the reaction with PhCCMe that affords 1,3,5-trimethyl-2,4,6-triphenyl benzene with high activity and selectivity (ca. 99%). As a general trend the catalytic activity is higher for internal (PhCCMe, PhCCPh) than for terminal alkynes (HCCPh, HCCtBu, HCCCO2Me). Under more drastic experimental conditions the reaction of 1 with PhCCPh yields trans-[PdCl2(PhCCPh)2] and no catalytic activity is observed. The molecular structure of 1,3,5-trimethyl-2,4,6-triphenyl benzene was confirmed by X-ray diffraction analysis. The molecules were characterized by 1H- and 13C-NMR spectroscopies, FAB-MS and, in some cases, elemental analyses.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4528d483da9dee548d6f2f3d5a1b688e https://doi.org/10.1016/s0022-328x(03)00557-6 Zobrazit plný text záznamu Full Text from ScienceDirect