Catalysts for enantioselective Biginelli reaction based on the composite silica-zirconia xerogels prepared using different zirconium sources / Krivtsov I. V.,Titova Yu. A.,Ilkaeva M. V.,Avdin V. V.,Fedorova O. V.,Khainakov S. A.,Garcia J. R.,Rusinov G. L.,Charushin V. N. // JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY. - 2014. - V. 69, l. 2. - P. 448-452.

ISSN/EISSN:

0928-0707 / 1573-4846

Type:

Article

Abstract:

The composite silica-zirconia xerogels have been prepared via sol-gel method using zirconium oxychloride, oxynitrate, acetate and sodium silicate as the precursors. The prepared materials have been characterized using FTIR, TG/DTA, EDX and surface area analyses. It has been established that surface area of silica-zirconia xerogels significantly depends on the zirconium source, but phase transitions and structural features of the xerogels seem to be unaffected by the choice of the zirconia precursor. Prepared xerogels increase the activity of chiral inductor in the asymmetric Biginelli reaction. The anion of the zirconium salt adsorbed on the surface of the synthesized material and the presence of Si-O-Zr heterolinkages determines the reaction yield. The highest chemo- and enantioselectivity towards formation of ee isomer have been provided by the catalyst prepared from zirconium oxychloride.

Author keywords:

Silica-zirconia; Biginelli reaction; Enantioselective catalyst; Sol-gel method ONE-POT SYNTHESIS; OXIDES; ACID

DOI:

10.1007/s10971-013-3242-z

Web of Science ID:

ISI:000330975000027

Соавторы в МНС:

—

Другие поля

Поле	Значение
Month	FEB
Publisher	SPRINGER
Address	VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
Language	English
EISSN	1573-4846
Keywords-Plus	ONE-POT SYNTHESIS; OXIDES; ACID
Research-Areas	Materials Science
Web-of-Science-Categories	Materials Science, Ceramics
Author-Email	zapasoul@gmail.com
ResearcherID-Numbers	Avdin, Viacheslav/L-4809-2013
ORCID-Numbers	Avdin, Viacheslav/0000-0003-2996-6346 Garcia-Menendez, Jose Ruben/0000-0001-7944-7398
Funding-Acknowledgement	Russian Ministry of Education {[}01201255647]; Russian Foundation for Basic Research {[}12-03-90039-Bel\_a, 13-03-12188-ofi\_m, 14-03-31357 mol\_a]; Ural Branch, Russian Academy of Sciences {[}12-P-234-2003, 12-P-3-1030]; State Program for the Support of Leading Scientific Schools {[}NSh 5505.2012.3]
Funding-Text	The study is carried out within the grant of Russian Ministry of Education No. 01201255647. This work was supported by the Russian Foundation for Basic Research, 12-03-90039-Bel\_a, 13-03-12188-ofi\_m, 14-03-31357 mol\_a; by the Ural Branch, Russian Academy of Sciences, project nos. 12-P-234-2003 and 12-P-3-1030; and by the State Program for the Support of Leading Scientific Schools, Grant NSh 5505.2012.3.
Number-of-Cited-References	17
Usage-Count-Since-2013	14
Journal-ISO	J. Sol-Gel Sci. Technol.
Doc-Delivery-Number	AA3EF