Buscar
Mostrando ítems 41-49 de 158
Use of Furan Derivatives Acting as Electrophilic Dienophiles: An Experimental and Theoretical Analysis of Polar Cycloaddition Reactions
(Nova Science Publishers, 2017)
Furans have, fundamentally, biological and chemical uses. For several years, we have been working with substituted furans as eletrophilic dienophiles joint to different nucleophilic dienes in Polar Diels-Alder Reactions ...
Controle regioquímico na síntese de 1-Aril-3(5)-carboxialquil-1H-pirazóis
(Universidade Federal de Santa MariaBrasilQuímicaUFSMPrograma de Pós-Graduação em QuímicaCentro de Ciências Naturais e Exatas, 2022-08-26)
The present dissertation reports the development of a methodology for the
regiochemical control in the synthesis of 1-aryl-3(5)-carboxyalkyl-1H-pyrazoles,
through cyclocondensation reactions using 4-alkoxy-1,1,1-trichl ...
Síntesis y estudio fotofísico de derivados vinílicos del naftoxazol
(Universidad de Chile, 2011)
En este trabajo se ha estudiado el efecto del solvente sobre las propiedades fotofísicas
de 10 derivados del vinil naftoxazol. Las moléculas se han separado en 3 grupos:
compuestos que incluyen anillos de i) benceno ...
Estudos sobre a síntese de derivados de 4H-piranos e 1,4-di-hidropiridinas via reação multicomponente de Hantzsch promovida pelo pentacloreto de nióbio
(Universidade Estadual Paulista (Unesp), 2017-03-24)
Compostos heterocíclicos constituem a maior e mais variada família de compostos orgânicos. Dentre esses compostos temos os derivados de 4H-piranos e 1,4-di-hidropiridinas (1,4-DHPs), que são importantes classes de moléculas ...
Reactividad química de 1,3-bis-(2'-hidroxi-5'-clorobencil) imidazolidina (BISBIA) frente a fenoles y naftoles en condiciones libre de disolvente (Solvent – Free)
(2012)
En este trabajo se hizo reaccionar 1,3-bis-(2'-hidroxi-5'-clorobencil)imidazolidina con naftoles (1-naftol y 2-naftol) y fenoles (4-cloro-3,5-xilenol y fenol) bajo condiciones solvent-free para evaluar el efecto del ...
A conformational analysis of some alpha-aryloxy p-substituted-acetophenones: Solvent effects on the nu(co) infrared bands
(Spectroscopy Soc Canada, OttawaOttawaCanadá, 2003)
Using room temperature ionic liquids as solvents to probe structural effects in electro-reduction processes. Electrochemical behavior of mutagenic disperse nitroazo dyes in room temperature ionic liquids
(2009-12-01)
The electrochemical reduction of the disperse azo dyes Red1, Red13 and Orange1 (Or1) was investigated in the RTILs [C4mim][NTf2] and [C4mpyrr][NTf2], and in contrast with their behavior in conventional aprotic solvents, ...