Banca de DEFESA: DANIEL MOREIRA ARAUJO

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : DANIEL MOREIRA ARAUJO
DATA : 18/12/2020
HORA: 08:00
LOCAL: Instituto de Química
TÍTULO:

Preparation of nitrogen compounds and application of chemometry for greater efficiency of mechanochemistry in the synthesis of synthetic intermediates

PALAVRAS-CHAVES:

tretrazols, chemometric, mechanochemistry

PÁGINAS: 140
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Química
SUBÁREA: Química Orgânica
ESPECIALIDADE: Síntese Orgânica
RESUMO:

One of the classes of compounds with the most important and fruitful application in medicinal chemistry is the tetrazoles that were synthesized in this work with a methodology of catalysis of bismuth as thiophile in thiocarbohydrazones. The use of bismuth as a catalyst has less environmental impact than thiophiles routinely used as mercury. To our surprise, four Bistetrazoles were obtained through this method, the scope was limited due to the low solubility of the solid formed after the addition of all reagents. The solid investigation in the complexes that complexes of the substrate thiocarbohydrazone with the bismuth are formed, these types of metallic complexes tend to present potential biological activity. Thus, 10 complexes were synthesized. In the search to insert more parameters of green chemistry in the synthesis of these binders, 10 thiocarbohydrazones were synthesized via a planetary ball mill mechanochemical reactor without solvent to supply 52% to quantitative products.

With the outcome regarding the “green” synthesis via mechanochemical, the synthesis of chlorinated acetanilide derivatives that are important building blocks was performed due to the main methods of this reaction using solvents, along with this the search for understanding the mechanochemical parameters to achieve a greater Efficiency in the reaction to Chemometrics was used. Thanks to this Mechanochemistry-Chemometrics alliance as variables, frequency of rotation, and reaction time, are significant for optimization while the number of spheres considered insignificant. This method was able, according to the green chemistry metric Factor-E, to be 16 times greener than the most efficient method in the literature, thus obtaining 3 chlorinated derivatives of acetanilide with specialties comparable to the largest specialized ones in the literature.

MEMBROS DA BANCA:
Interno - 1215450 - SILVIO DO DESTERRO CUNHA
Interno - 1148522 - ELIANE DE OLIVEIRA SILVA
Interno - 1068075 - JORGE MAURICIO DAVID
Interno - 1276681 - RONAN BATISTA
Interno - 268481 - SERGIO LUIS COSTA FERREIRA
Externo ao Programa - 2585200 - ANGELICA FERRAZ GOMES
Externo ao Programa - 1788171 - BRUNO OLIVEIRA MOREIRA
Externo ao Programa - 1568172 - ROSANA LOPES LIMA FIALHO
Externo à Instituição - AMENSON TRINDADE GOMES - UFRB