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Waikikiamides A-C: Complex Diketopiperazine Dimer and Diketopiperazine-Polyketide Hybrids from a Hawaiian Marine Fungal Strain Aspergillus sp. FM242
(American Chemical Society, 2020-06)
Waikikiamides A-C (1-3), structurally complex diketopiperazine derivatives, and putative biogenic precursors, (+)-semivioxanthin (4), notoamide F (5), and (-)-notoamide A (6), were isolated from Aspergillus sp. FM242. 1 ...
Diketopiperazines and arylethylamides produced by Schizophyllum commune, an endophytic fungus in Alchornea glandulosa
(2019-01-01)
Chemical investigation of the crude PDB extract obtained from the endophytic fungus Schizophyllum commune afforded the pure substances, cyclo(L-Pro-L-Val) (1), uracil (2), cyclo(Pro-Tyr) (3), p-hydroxybenzoic acid (4) and ...
Diketopiperazines from Costa Rican endolichenic fungus Colpoma sp. CR1465A
(2016-05-15)
Three new diketopiperazines (1–3), cyclo(l-Pro-d-trans-Hyp) (1), cyclo(l-Pro-d-Glu) (2), and cyclo(d-Pro-d-Glu) (3) and five known diketopiperazines (4–8) were isolated from the endolichenic fungus Colpoma sp. CR1465A ...
Diketopiperazines from Costa Rican endolichenic fungus Colpoma sp. CR1465A
(2016-05-15)
Three new diketopiperazines (1–3), cyclo(l-Pro-d-trans-Hyp) (1), cyclo(l-Pro-d-Glu) (2), and cyclo(d-Pro-d-Glu) (3) and five known diketopiperazines (4–8) were isolated from the endolichenic fungus Colpoma sp. CR1465A ...
Highly stereoselective synthesis of steroidal 2,5-diketopiperazines based on isocyanide chemistry
(Pergamon-Elsevier Science Ltd, 2009-07)
In this Letter we report that the Ugi reaction/cyclization sequence on a steroidal 17-carboxaldehyde leads to novel steroidal 2,5-diketopiperazines with a noteworthy stereoselectivity. A wide variety in the substitution ...
Novel and facile solution-phase synthesis of 2,5-diketopiperazines and O-glycosylated analogs
(PERGAMON-ELSEVIER SCIENCE LTD, 2009)
This work describes the synthesis in Solution of a series of related diketopiperazines with potential biological activities: cyclo(L-Pro-L-Ser), cyclo(L-Phe-L-Ser), cyclo(D-Phe-L-Ser) and the corresponding glycosylated ...
CYCLO-(TRP-PHE) DIKETOPIPERAZINES FROM THE ENDOPHYTIC FUNGUS Aspergillus versicolor ISOLATED FROM Piper aduncum#
(Soc Brasileira Quimica, 2017-02-01)
Six known compounds, three peptide derivatives: cyclo-(tryptophyl-phenylalanyl) (2), diketopiperazine dimer WIN 64821 (3) and 3-hydroxy-15H-tryptophenaline (4), one adenine derivative: 2-hydroxy-6-N-isopentenyl-adenine ...
Diketopiperazines produced by an Aspergillus fumigatus Brazilian strain
(Soc Brasileira QuimicaSao PauloBrasil, 2005)
Penicillium chrysogenum, an endophyte from Padina gymnospora, as a source of diketopiperazines, peptides and griseofulvin
(Georg Thieme Verlag Kg, 2015-07-01)