Abstract
The condensation of barbituric acids with aromatic aldehydes gives the phenyl barbiturilidenes, which are studied as intermediary compounds in the synthesis of new heterocyclic compounds for pharmaceutical use. One of the most characteristic reactions of these compounds is the Michael type addition reaction, in the exocyclic carbon-carbon double binding. The reaction with 2,4-di nitrophenyl hydrazine reaction is been used as a test of this type of reactivity, which supplies the respective hydrazone and barbituric acid. In this work, preliminary studies have been performed for establishing correlations between the Brown parameter ({sigma}{sup +}), the chemical shifts ({delta}) of the barbiturilidene atoms involved in the reaction, and their reactivities 3 refs., 1 fig., 6 tabs.
Villar, Jose Daniel Figueroa;
Santos, Nedina Lucia dos;
Cruz, Elizabete Rangel
[1]
- Instituto Militar de Engenharia (IME), Rio de Janeiro, RJ (Brazil). Secao de Quimica
Citation Formats
Villar, Jose Daniel Figueroa, Santos, Nedina Lucia dos, and Cruz, Elizabete Rangel.
{sup 1} H and {sup 13} C NMR of phenyl barbiturilidene; RMN de H-1 e C-13 de fenil barbiturilidenos.
Brazil: N. p.,
1991.
Web.
Villar, Jose Daniel Figueroa, Santos, Nedina Lucia dos, & Cruz, Elizabete Rangel.
{sup 1} H and {sup 13} C NMR of phenyl barbiturilidene; RMN de H-1 e C-13 de fenil barbiturilidenos.
Brazil.
Villar, Jose Daniel Figueroa, Santos, Nedina Lucia dos, and Cruz, Elizabete Rangel.
1991.
"{sup 1} H and {sup 13} C NMR of phenyl barbiturilidene; RMN de H-1 e C-13 de fenil barbiturilidenos."
Brazil.
@misc{etde_636790,
title = {{sup 1} H and {sup 13} C NMR of phenyl barbiturilidene; RMN de H-1 e C-13 de fenil barbiturilidenos}
author = {Villar, Jose Daniel Figueroa, Santos, Nedina Lucia dos, and Cruz, Elizabete Rangel}
abstractNote = {The condensation of barbituric acids with aromatic aldehydes gives the phenyl barbiturilidenes, which are studied as intermediary compounds in the synthesis of new heterocyclic compounds for pharmaceutical use. One of the most characteristic reactions of these compounds is the Michael type addition reaction, in the exocyclic carbon-carbon double binding. The reaction with 2,4-di nitrophenyl hydrazine reaction is been used as a test of this type of reactivity, which supplies the respective hydrazone and barbituric acid. In this work, preliminary studies have been performed for establishing correlations between the Brown parameter ({sigma}{sup +}), the chemical shifts ({delta}) of the barbiturilidene atoms involved in the reaction, and their reactivities 3 refs., 1 fig., 6 tabs.}
place = {Brazil}
year = {1991}
month = {Dec}
}
title = {{sup 1} H and {sup 13} C NMR of phenyl barbiturilidene; RMN de H-1 e C-13 de fenil barbiturilidenos}
author = {Villar, Jose Daniel Figueroa, Santos, Nedina Lucia dos, and Cruz, Elizabete Rangel}
abstractNote = {The condensation of barbituric acids with aromatic aldehydes gives the phenyl barbiturilidenes, which are studied as intermediary compounds in the synthesis of new heterocyclic compounds for pharmaceutical use. One of the most characteristic reactions of these compounds is the Michael type addition reaction, in the exocyclic carbon-carbon double binding. The reaction with 2,4-di nitrophenyl hydrazine reaction is been used as a test of this type of reactivity, which supplies the respective hydrazone and barbituric acid. In this work, preliminary studies have been performed for establishing correlations between the Brown parameter ({sigma}{sup +}), the chemical shifts ({delta}) of the barbiturilidene atoms involved in the reaction, and their reactivities 3 refs., 1 fig., 6 tabs.}
place = {Brazil}
year = {1991}
month = {Dec}
}