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Master's Dissertation
DOI
https://doi.org/10.11606/D.75.2018.tde-21082018-092753
Document
Author
Full name
Renata Torres Mattos Paschoalino de Souza
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2018
Supervisor
Committee
Berlinck, Roberto Gomes de Souza (President)
Burtoloso, Antonio Carlos Bender
Vieira, Paulo Cezar
Vilegas, Wagner
Title in Portuguese
Alcaloides bromopirrólicos da Esponja Marinha Dictyonella sp. do Delta do Rio Amazonas
Keywords in Portuguese
alcaloides bromopirrólicos
esponja marinha
foz do Rio Amazonas
Metabólitos secundários
Abstract in Portuguese

A descoberta de metabólitos secundários de esponjas marinhas decorre da enorme diversidade de entidades químicas e atividades biológicas que estes animais apresentam. O presente projeto origina-se da coleta de dois gêneros de esponja (Dictyonella e Agelas) em expedição a bordo do Navio Cruzeiro do Sul (Marinha do Brasil) ao longo da margem equatorial da Foz Rio do Amazonas (Pará). Esta região é submetida a um forte ciclo sazonal no padrão de dispersão da pluma do Rio Amazonas. Purificação extensiva do extrato aquoso da Dictyonella sp. através de vários passos cromatográficos de separação, levou ao isolamento e identificação de 7 alcalóides bromopirrólicos: himenidina (16), clathrodina (17) e monobromoisofakelina (20) são compostos já reportados na literatura. A 4-desbromooroidina (28), 5-desbromo-seco-isofakelina (30), 4-desbromo-seco-isofakelina (31) e 5-bromopalau'amina (32) não foram reportados na literatura até então, sendo compostos inéditos. Da esponja Agelas sventres, foi isolado a oroidina (15), o primeiro composto da classe dos alcalóides pirrólicos a ser isolado reportado na literatura.

Title in English
Bromopyrroles from Marine Sponge Dictyonella sp. from Amazon River Mouth
Keywords in English
Amazon River mouth
bromopyrrolic alkaloids
marine sponge
secondary metabolites
Abstract in English

The discovery of secondary metabolites from marine sponges is consequential from the enormous diversity of chemical entities and biological activities presented by these animals. This project originates from the collection of two genera of sponges (Dictyonella and Agelas), in an expedition aboard the Cruzeiro do Sul ship (Brazilian Navy) along the equatorial margin of Amazon river mouth (Pará). This region is subject to a strong seasonal cycle related to the pattern of dispersion of the plume of the Amazon River. Extensive purification of the MeOH extract of Dictyonella sp. through several chromatographic steps of separation, led to the isolation and identification of 7 bromopyrrole alkaloids: hymenidin (16), clathrodin (17) and monobromoisophakellin (20), compounds already reported in the literature. 4-Desbromooroidin (28), 5-debromo-seco-isophakellin (30), 4-debromo-seco-isophakellin (31) and 5-bromopalau'amine (32) were not yet reported in the literature. The purification of the sponge Agelas sventres extract led to the isolation of oroidin is the first compound of pyrrole alkaloids ever isolated.

 
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Publishing Date
2018-08-22
 
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