Počet záznamů: 1
Organic carbonates as solvents in macrocyclic Mn(III) salen catalyzed asymmetric epoxidation of non-functionalized olefins
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SYSNO ASEP 0392334 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Organic carbonates as solvents in macrocyclic Mn(III) salen catalyzed asymmetric epoxidation of non-functionalized olefins Tvůrce(i) Maity, N. Ch. (IN)
Rao, G. V. S. (IN)
Prathap, Kaniraj Jeya (UOCHB-X)
Abdi, S. H. R. (IN)
Kureshy, R. I. (IN)
Khan, N. H. (IN)
Bajaj, H. C. (IN)Celkový počet autorů 7 Zdroj.dok. Journal of Molecular Catalysis A-Chemical. - : Elsevier - ISSN 1381-1169
Roč. 366, January (2013), s. 380-389Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. NL - Nizozemsko Klíč. slova asymmetric epoxidation ; organic carbonate ; macrocyclic Mn(III) salen complex Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Institucionální podpora UOCHB-X - RVO:61388963 UT WOS 000313230200050 EID SCOPUS 84870252910 DOI 10.1016/j.molcata.2012.10.021 Anotace Organic carbonates, e.g., dimethyl carbonate and propylene carbonate were used as reaction media in enantioselective epoxidation of non-functionalized alkenes by using a series of chiral macrocyclic Mn(III) salen complexes (5 mol%) as catalyst with pyridine N-oxide as an axial base. This protocol worked effectively with urea hydrogen peroxide, as well as sodium hypochlorite as oxidants to give respective epoxides in high yields and ee (up to >91% in selected cases). Furthermore kinetic studies of the catalytic epoxidation reaction in dimethyl carbonate:methanol (optimized solvent mixture) with urea hydrogen peroxide as an oxidant showed first order dependence on catalyst and oxidant whereas it is zero order for the substrate, styrene. Pracoviště Ústav organické chemie a biochemie Kontakt asep@uochb.cas.cz ; Kateřina Šperková, Tel.: 232 002 584 ; Viktorie Chládková, Tel.: 232 002 434 Rok sběru 2014
Počet záznamů: 1