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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Síntese de biomarcadores 3-n-propilergostânicos : comprovação estrutural dos ácidos 3-n-propilergostanóicos em óleos da Bacia de Campos / Synthesis of 3-n-propylergostane biomarkers. Structural proof of 3-npropylergostanoic acids identified in Campos basin oils

Sampaio, Felipe Ribeiro, 1988- 25 August 2018 (has links)
Orientador: Francisco de Assis Machado Reis / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Química / Made available in DSpace on 2018-08-25T12:23:58Z (GMT). No. of bitstreams: 1 Sampaio_FelipeRibeiro_M.pdf: 2993184 bytes, checksum: 76574cddb68ff72787da04d789b1d24d (MD5) Previous issue date: 2013 / Resumo: Nesse trabalho, foram sintetizados 5 padrões 3n-propil-noresgostanos. Esses compostos são os hidrocarbonetos correspondentes a uma série homóloga de biomarcadores ácidos 3n-propil-ergostanóicos encontrados em óleos de Pampo Sul, Bacia de Campos, os quais estão associados a processos de biodegradação (LIMA, 2010). Considerando-se que a estrutura tridimensional dos biomarcadores é crucial, utilizou-se como material de partida o estigmasterol. A rota sintética consistiu em uma série de reações estereo e regiosseletiva que levaram à formação de compostos com diferentes cadeias laterais ligadas ao C-17. As análises por RMN de 13C e espectrometria de massas confirmaram a estereoquímica 3?-propil, 5?(H), 14?(H), 17?(H) e 20R. A amostra de óleo foi extraída, obtendo-se a fração ácida. Esta foi derivatizada a hidrocarbonetos para que fosse possível a co-injeção com os padrões sintéticos. A co-injeção dos padrões com a amostra de óleo derivatizada confirmou a presença desses compostos, porém para picos menos abundantes. Além disso, foi confirmada a presença de um novo biomarcador / Abstract: In this work, 5 standards 3n(propryl)-norergostanes were synthesized. The compounds are the corresponding hydrocarbons of homologous series of acid biomarkers 3n-propyl-ergostanoics found in Pampo Sul, oils, Campos basin, which are associated with biodegradation processes (LIMA, 2010). Considering that the three-dimensional structure of biomarkers is crucial, stigmasterol was chosen as starting material. The synthetic route consisted in a series of stereo and regioselective reactions leading to the formation of compounds with different side chains attached to C-17. Analysis by 13C NMR and mass spectrometry confirmed the stereochemistry 3?-propil, 5?(H), 14?(H), 17?(H) e 20R. The oil sample was extracted, obtaining the acidic fraction which was submitted to a derivatization process, obtaining the hydrocarbons derivatives that were used in co-injection with the synthetic standards. The co-injection of the standards with the oil sample confirmed the presence of these compounds, however for the less abundant peaks. In addition, a new biomarker was confirmed / Mestrado / Quimica Organica / Mestre em Química

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