2005
DOI: 10.1021/jo048525n
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Grandisine A and B, Novel Indolizidine Alkaloids with Human δ-Opioid Receptor Binding Affinity from the Leaves of the Australian Rainforest Tree Elaeocarpus grandis

Abstract: Two novel indolizidine alkaloids, grandisine A (1) and B (2), and the known alkaloid (-) isoelaeocarpiline (3) were isolated from the leaves of Elaeocarpus grandis and their structures determined by 1D and 2D NMR spectroscopy. The compounds showed affinity for the human delta-opioid receptor. Grandisine A contains a unique tetracyclic skeleton, while grandisine B possesses the unique combination of isoquinuclidinone and indolizidine groups in one molecule.

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Cited by 58 publications
(56 citation statements)
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“…More recently, the use of mono-and bidimensional 1 H and 13 C NMR spectra has allowed the structural assignment of natural compounds possessing an indolizidine nucleus [66]. The most general approach to indolizines is the Chichibabin synthesis (Scheme 22.14) [70].…”
Section: Relevant Natural And/or Useful Compoundsmentioning
confidence: 99%
“…More recently, the use of mono-and bidimensional 1 H and 13 C NMR spectra has allowed the structural assignment of natural compounds possessing an indolizidine nucleus [66]. The most general approach to indolizines is the Chichibabin synthesis (Scheme 22.14) [70].…”
Section: Relevant Natural And/or Useful Compoundsmentioning
confidence: 99%
“…4,5 No Brasil, a família Elaeocarpaceae é representada pelos gêneros Sloanea e Crinodendron, cuja fitoquímica é bem pouco conhecida. Somente uma espécie de cada gênero foi investigada e ambas são descritas como fonte de curcubitacinas citotóxicas.…”
Section: Introductionunclassified
“…1 Os gêneros Aristotelia, Peripentadenia e Elaeocarpus estão entre os mais estudados dentro da família e são conhecidos como fonte de metabólitos ativos derivados de ácido elágico, 2 além de alcalóides pirrolidínicos 3 e indolizidínicos. 4,5 No Brasil, a família Elaeocarpaceae é representada pelos gêneros Sloanea e Crinodendron, cuja fitoquímica é bem pouco conhecida. Somente uma espécie de cada gênero foi investigada e ambas são descritas como fonte de curcubitacinas citotóxicas.…”
Section: Introductionunclassified
“…3 Interestingly, mearsine 4 and grandisine B 5 are the only isoquinuclidin-5-one alkaloids reported, while N-methylisoquinuclidin-5-one (dioscorone) is an intermediate in the synthesis of the alkaloid dioscorine. 6 Isoquinuclidin-5-one derivatives have been synthesized either by cycloaddition processes of cyclohexadiene compounds 7,8 or by lactamization of 4-aminocyclohexanecarboxylate derivatives, prepared from benzene derivatives.…”
Section: Introductionmentioning
confidence: 99%