Resina de Protium heptaphyllum: isolamento, caracterização estrutural e avaliação das propriedades térmicas
Three mixtures of triterpenes (maniladiol and breine; alpha and beta-amyrin; lupenone, alpha and beta-amyrinone) were isolated from Protium heptaphyllum March resin. The structural identification was based on NMR and mass spectrometry data. Lupenone, and alpha and beta-amyrinone were not reported before as constituents of this resin. The resin was submitted to methylation and acetylation reactions. The pure and derivatized resins and the mixtures (maniladiol and breine; alpha and beta-amyrin) were analyzed by TG and DSC. The TG curves revealed that the derivatization decreases the thermal stability of the resin. The DSC curves showed peaks that can be assigned to evaporation and phase transitions processes.
Saved in:
Main Authors: | Vieira Júnior,Gerardo Magela, Souza,Cleide Maria Leite de, Chaves,Mariana Helena |
---|---|
Format: | Digital revista |
Language: | Portuguese |
Published: |
Sociedade Brasileira de Química
2005
|
Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422005000200003 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Almecegueira: Protium heptaphyllum.
by: CARVALHO, P. E. R.
Published: (2022-03-10) -
Triterpenos da resina de Protium heptaphyllum March (B0urseraceae): caracterização em misturas binárias
by: Maia,Robinson Magalhães, et al.
Published: (2000) -
Propagação vegetativa do Protium spp: Protium heptaphyllum, Protium spruceanum e Protium guacayanum.
by: LIMA, S. C. de S.
Published: (2013-03-07) -
Natural oxidation of monoterpenes in Protium heptaphyllum oilresin.
by: ALBINO, R. da C., et al.
Published: (2015-11-23) -
Metabólitos secundários de Protium heptaphyllum march
by: Bandeira,Paulo Nogueira, et al.
Published: (2002)