Literature DB >> 17729233

3-Oxo-12alpha-hydroxyfriedelane from Maytenus gonoclada: structure elucidation by (1)H and (13)C chemical shift assignments and 2D-NMR spectroscopy.

Mauro Lúcio G Oliveira1, Lucienir Pains Duarte, Grácia Divina F Silva, Sidney Augusto Vieira Filho, Vagner Fernandes Knupp, Fernando Gomes P Alves.   

Abstract

The compounds 3-oxofriedelane (1), 3beta-hydroxyfriedelane (2), 3,11-dioxofriedelane (3), 3,16-dioxofrie delane (4) and 3-oxo-12alpha-hydroxyfriedelane (5) were isolated from the hexane extract of Maytenus gonoclada Mart. (Celastraceae) leaves. Structural formula and the stereochemistry of the new pentacyclic triterpene 3-oxo-12alpha-hydroxyfriedelane (5) were established through (1)H and (13)C NMR and DEPT 135 spectral data including 2D experiments (HMBC, HMQC, COSY, and NOESY) and mass spectrometry (GC-MS). (c) 2007 John Wiley & Sons, Ltd.

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Year:  2007        PMID： 17729233     DOI： 10.1002/mrc.2062

Source DB:  PubMed          Journal:  Magn Reson Chem        ISSN： 0749-1581            Impact factor:   2.447


  2 in total

Review 1.  Pentacyclic Triterpenoids Isolated from Celastraceae: A Focus in the 13C-NMR Data.

Authors:  Karen Caroline Camargo; Mariana Guerra de Aguilar; Acácio Raphael Aguiar Moraes; Raquel Goes de Castro; Daiane Szczerbowski; Elizabeth Luciana Marinho Miguel; Leila Renan Oliveira; Grasiely Faria Sousa; Diogo Montes Vidal; Lucienir Pains Duarte
Journal:  Molecules       Date:  2022-01-31       Impact factor: 4.411

2.  Stereochemistry of 16a-hydroxyfriedelin and 3-Oxo-16-methylfriedel-16-ene established by 2D NMR spectroscopy.

Authors:  Lucienir Pains Duarte; Roqueline Rodrigues Silva de Miranda; Salomão Bento Vasconcelos Rodrigues; Grácia Divina de Fátima Silva; Sidney Augusto Vieira Filho; Vagner Fernandes Knupp
Journal:  Molecules       Date:  2009-02-04       Impact factor: 4.411
  2 in total

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