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

Result code in 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>
Alternative codes found
RIV/61389013:_____/15:00452684
Result on the web
<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>

Result language
angličtina
Original language name
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
Original language description
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
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CC - Organic chemistry
OECD FORD branch
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Project
<a href="/en/project/GA14-00925S" target="_blank" >GA14-00925S: Immobilized Enantioselective Catalysts</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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