Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ LAReferencia - Red F...arrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
versions View all 1 versions
addClaim

Sesquiterpenos e lignanas de Holostylis reniformis

Authors: Pereira, Marcos Donizete Peliçon;

Sesquiterpenos e lignanas de Holostylis reniformis

Abstract

Holostylis reniformis sintetiza uma variedade de compostos, incluindo seco lignanas e sesquiterpenos. Em busca de potenciais compostos antimaláricos, novos estudos fitoquímicos dos extratos de raízes foram realizados. Este trabalho descreve o isolamento de quatorze compostos por meio de técnicas cromatográficas, principalmente por CCD e CC, e CLAE. Estes compostos foram caracterizados por métodos espectrométricos, especialmente por experimentos de RMN e medidas de rotação óptica específica. A partir dos extratos de raízes de H. reniformis três sesquiterpenos novos, 4,5-seco-guaiano (7-epi-11-hidroxichabrolidiona A, XIV), uma lactona de nove membros (holostilactona, XV), e uma megastigmana [(6S,9S,7E)- 6,9-di-hidroxi-10-(2'-hidroxietoxi)-4,7-megastigmadien-3-ona, XVI], juntamente com uma nova lignana [(7R, 7'R,8S,8'S)-8,8'-dimetil-4-hidroxi-3',4',5,7-tetrametil-2,7'- ciclolignana, VIII] foram isoladas. Além disso, os compostos conhecidos sitosterol (I), alantoína (XI), e a lignana furânica futokadsurin C (IX) foram obtidos. Visando estudos posteriores sobre estrutura e atividade antimalárica, o composto (7'R,8S,8'S)-8,8'-dimetil-3',4',4,5-tetrametil-2,7'-ciclolignan-7-ona foi submetido a transformações químicas gerando dois derivados.

Holostylis reniformis can synthesize a variety of seco compounds including lignans and sesquiterpenes. In search of potential antimalarial compounds further phytochemical studies on the root extracts were carried out. This work describes the isolation of 14 compounds by chromatographic techniques, mainly by TLC, CC, and HPLC. These compounds were characterized by spectrometric methods, particularly by NMR experiments and optical rotation measurements. From the root extracts of H. reniformis three new sesquiterpenes, 4,5-seco-guaiane (7-epi-11- hydroxychabrolidione A, XIV), a nine-membered lactone (holostylactone, XV), and a megastigmane [(6S,7E,9S)-6,9-dihydroxy-10-(2'-hydroxyethoxy)-4,7-megastigmadien -3-one, XVI], together with a new lignan [(7R,7′R,8S,8′S)-8,8′-dimethyl-4-hydroxy- 3′,4′,5,7-tetramethoxy-2,7′-cyclolignan, VIII] were isolated. In addition, the known compounds sitosterol (I), allantoin (XI), and a tetrahydrofuran lignans futokadsurin C (IX) were obtained. (7′R,8S,8′S)-8,8′-dimethyl-3′,4′,4,5-tetramethoxy-2,7′-cyclolignan-7-one was subjected to chemical transformations into two derivatives for further structure and antimalarial activity studies

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Pós-graduação em Química - IQ

Country
Brazil
Keywords

Produtos naturais, Sesquiterpenos, Aristoloquiacea, Lignanas, Lignans

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green
Related to Research communities