Magnetically recoverable catalyst for the asymmetric Henry reaction based on a substituted imidazolidine-4-one copper(II) complex supported by Fe3O4 center dot SiO2 nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F15%3A39899689" target="_blank" >RIV/00216275:25310/15:39899689 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389013:_____/15:00452684

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.tetasy.2015.10.003" target="_blank" >http://dx.doi.org/10.1016/j.tetasy.2015.10.003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tetasy.2015.10.003" target="_blank" >10.1016/j.tetasy.2015.10.003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Magnetically recoverable catalyst for the asymmetric Henry reaction based on a substituted imidazolidine-4-one copper(II) complex supported by Fe3O4 center dot SiO2 nanoparticles

Popis výsledku v původním jazyce

The preparation and characterization of a heterogeneous recyclable catalyst based on Cu(II) complex of magnetic nanoparticles Fe3O4 center dot SiO2 with (2R,5S)-5-isopropyl-5-methyl-2-(pyridine-2-y)imidazolidine-4-one is described. The ligand molecules were attached to the surface by means of coordination bonds. The catalyst was characterized using DLS, FT-IR spectroscopy, SEM, and microanalysis. The reaction of substituted aldehydes with nitromethane catalyzed with this complex proceeded with high yields (82-99%) and high enantioselectivity (68-94%). The reaction rate decreased due to the formation of aggregated forms of the catalyst nanoparticles whose size (115-834 nm) depends on their concentration in the reaction medium. After a tenfold recyclingof the catalyst, the catalytic activity slightly decreased (similar to 10%); however, no change in enantioselectivity was observed (similar to 94% ee). The efficiency of the catalyst prepared was also verified in the preparation of an int

Název v anglickém jazyce

Magnetically recoverable catalyst for the asymmetric Henry reaction based on a substituted imidazolidine-4-one copper(II) complex supported by Fe3O4 center dot SiO2 nanoparticles

Popis výsledku anglicky

The preparation and characterization of a heterogeneous recyclable catalyst based on Cu(II) complex of magnetic nanoparticles Fe3O4 center dot SiO2 with (2R,5S)-5-isopropyl-5-methyl-2-(pyridine-2-y)imidazolidine-4-one is described. The ligand molecules were attached to the surface by means of coordination bonds. The catalyst was characterized using DLS, FT-IR spectroscopy, SEM, and microanalysis. The reaction of substituted aldehydes with nitromethane catalyzed with this complex proceeded with high yields (82-99%) and high enantioselectivity (68-94%). The reaction rate decreased due to the formation of aggregated forms of the catalyst nanoparticles whose size (115-834 nm) depends on their concentration in the reaction medium. After a tenfold recyclingof the catalyst, the catalytic activity slightly decreased (similar to 10%); however, no change in enantioselectivity was observed (similar to 94% ee). The efficiency of the catalyst prepared was also verified in the preparation of an int

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CC - Organická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/GA14-00925S" target="_blank" >GA14-00925S: Imobilizované enantioselektivní katalyzátory</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Tetrahedron Asymmetry

ISSN

0957-4166

e-ISSN

—

Svazek periodika

26

Číslo periodika v rámci svazku

21-22

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

1300-1306

Kód UT WoS článku

000364610300011

EID výsledku v databázi Scopus

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