Title

Bioactive secondary metabolites from six trees of the family fabaceae (leguminosae)

Date of Publication

2002

Document Type

Dissertation

Degree Name

Doctor of Philosophy in Chemistry

Subject Categories

Chemistry

College

College of Science

Department/Unit

Chemistry

Thesis Adviser

Consolacion Y. Ragasa

Defense Panel Chair

Jaime Raul O. Janairo

Defense Panel Member

Glenn V. Alea
Nancy Lazaro-Llanos
Eric R. Punzalan
Alice Aguinaldo

Abstract/Summary

A total of nineteen compounds are isolated from the six trees covered in this study.Four new cassane diterpenes 6B-hydroxy-vouacapen-5a-01 (CB33), 6B-benzoyl-7B-hydroxy-vouacapen-5a-01 (CB26) and 6B-benzoyl-8,9,11, 14-didehydro-vouacapen-5a-01 (CB 'isomer') were obtained from the DCM extract of Caesalpinia pulcherrima. Their structures were elucidated by extensive ID and 2D NMR analysis. CB22, a probable new furanoditerpene monoacetate variation of CB33, could not be fully elucidated due to its minimal amount and the presence of impurities. Four known compounds were also isolated namely, benzyl 2,6-dimethoxybenzoate (CB8), phytol (CB23), sitosterol (CB25), and squalene (CB36).The ethyl acetate extract of Pithecolobium dulce afforded kaempferol 3-a-L-rhamnoside (KM) and a 2:1 mixture of 1,3-glyceryl diacetate (KM3a) and 1,2-glyceryl diacetate (KM3b). Their structures were elucidated by 1D and 2D NMR analysis.

Abstract Format

html

Language

English

Format

Print

Accession Number

TG03251

Shelf Location

Archives, The Learning Commons, 12F Henry Sy Sr. Hall

Physical Description

412 leaves

Keywords

Plant metabolites; Trees; Legumes; Microbial sensitivity tests; Chemistry, Analytic

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