Oxidative carbonylation of phenol to diphenyl carbonate catalyzed by bis(benzonitrile)dichloropalladium in the presence of polyvinylpyrrolidone

Autor:	Hirotoshi Ishii, Michihiko Asai, Kazuhiko Takeuchi, Mitsuru Ueda
Rok vydání:	2001
Předmět:	Ammonium bromide Polyvinylpyrrolidone Process Chemistry and Technology chemistry.chemical_element General Chemistry Catalysis chemistry.chemical_compound Benzonitrile chemistry Diphenyl carbonate medicine Phenol Carbon monoxide Nuclear chemistry Palladium medicine.drug
Zdroj:	Catalysis Communications. 2:17-22
ISSN:	1566-7367
DOI:	10.1016/s1566-7367(01)00002-4
Popis:	Pd(PhCN)2Cl2 [bis(benzonitrile)dichloropalladium] were investigated in the presence of polyvinylpyrrolidone (PVP) as a polymer support for the direct synthesis of diphenyl carbonate (DPC) by the oxidative carbonylation of phenol using carbon monoxide (CO) and air. Pd(PhCN)2Cl2 was found to be more efficient than the conventional PdBr2 system, and its efficiency was accelerated in the presence of high molecular weight PVP with Mw=360,000 and 1,300,000. The best efficiency of Pd(PhCN)2Cl2/Mn(TMHD)3 [tris(2,2,6,6-tetramethyl-3,5-heptanedionato)manganese]/(Ph3P)2NBr [bis(triphenylphosphoranylidene)ammonium bromide] system was obtained by using 0.241 mmol of PVP with Mw=360,000 where TOF (turnover frequency) reached 11.31 (mol-DPC/mol-Pd h, Pd/Mn/Br/phenol=1/2/20/2667; CO 0.50 MPa; air 0.25 MPa, 100°C, 3 h).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::158ddf251bfe61426015d8fceb464819 https://doi.org/10.1016/s1566-7367(01)00002-4 Zobrazit plný text záznamu Full Text from ScienceDirect