Calix N Arenes
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. Novel Greener Microwave-Assisted Deprotection Methodology for the 1,3-Dioxolane Ketal of Isatin Using Calix[n]arenes
In this work, the combined use of p-sulfonic acid-calix[n]arene and microwave energy to hydrolyze the 1,3-dioxolane ketal of isatin was evaluated with excellent results. This is the first time that p-sulfonic acid-calix[n]arene has been used as the catalyst in a ketal hydrolysis reaction and the deprotection of the ketone carbonyl of isatin is reported. The
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Synthesis of N,O-Type Inherently Chiral Calix[4]arenes Substituted on the Lower Rim and their Organocatalysis Properties
This work presented the first study of organocatalytic behaviors of inherently chiral calix[4]arenes substituted at the lower rim. A pair of N, O-type enantiomers based on inherently chiral calix[4]arenes substituted at the lower rim were readily synthesized and applied to catalyze Henry reaction between aromatic aldehydes and nitromethane. Their organocatal
J. Braz. Chem. Soc.. Publicado em: 2017-08
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3. Calix[n]arenos como sistemas de encapsulamento e plataforma para catalisadores assimétricos / Calix[n]arenes as encapsulation systems and platform for asymmetric catalysts
A química supramolecular tem evoluído ao longo das últimas três décadas, e tem se mostrado um campo extremamente dinâmico e verdadeiramente interdisciplinar. O presente trabalho teve por meta sintetizar derivados do p-tert-butilcalix[4 e 6]areno, visando aplicá-los como plataforma para ligantes assimétricos e sistemas carreadores da isoniazida. Prime
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/07/2011
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4. Encapsulamento de moléculas bioativas com calix[n]arenos e avaliação da atividade fitotóxica de complexos de inclusão com aldiminas / Encapsulation of bioactive molecules with calix[n]arenes and evaluation of phytotoxic activity the inclusion complexes with aldimines
This research had as main objective to study intermolecular interactions using 1H NMR as major tool. The first chapter describes the synthesis of six molecules, two of them employed as molecular hosts: p-sulphonic acid calix[6]arene (SO3HCX[6]) (3) and p-sulphonic acid calix[4]arene (SO3HCX[4]) (6). The calixarenes synthesized were employed in the encapsulat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/07/2009