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Three Diketopiperazine Alkaloids with Spirocyclic Skeletons and One Bisthiodiketopiperazine Derivative from the Mangrove-Derived Endophytic Fungus Penicillium brocae MA-231.
Four new diketopiperazines including spirobrocazines A-C (1-3) and brocazine G (4) were characterized from the mangrove-derived Penicillium brocae MA-231. Compounds 1 and 2 had a 6/5/6/5/6 cyclic… Expand
An enzymatic [4+2] cyclization cascade creates the pentacyclic core of pyrroindomycins.
The [4+2] cycloaddition remains one of the most intriguing transformations in synthetic and natural products chemistry. In nature, however, there are remarkably few enzymes known to have this… Expand
New Austalides from the Sponge-Associated Fungus Aspergillus sp.†
Chromatographic separation of a crude extract obtained from the fungus Aspergillus sp., isolated from the Mediterranean sponge Tethya aurantium, yielded five new meroterpenoid metabolites, austalides… Expand
Curvularin-type metabolites from the fungus Curvularia sp. isolated from a marine alga.
Two new curvularin-type macrolides, curvulone A (1) and B (2), and two known ones (3a, 4) of the rare 15R series have been isolated from the fungus Curvularia sp., which has been isolated from the… Expand
Diketopiperazine alkaloids from a mangrove rhizosphere soil derived fungus Aspergillus effuses H1-1.
- Huquan Gao, Weizhong Liu, +7 authors Dehai Li
- Chemistry, Medicine
- Organic & biomolecular chemistry
- 16 November 2012
Effusin A (1), a spirobicyclic N,O-acetal derivative with an unprecedented 3',3a',5',6'-tetrahydrospiro[piperazine-2,2'-pyrano[2,3,4-de]chromene] ring system, and a spiro-polyketide-diketopiperazine… Expand
Structure, absolute configuration, and conformational study of 12-membered macrolides from the fungus Dendrodochium sp. associated with the sea cucumber Holothuria nobilis Selenka.
- P. Sun, Dong-xiao Xu, +4 authors W. Zhang
- Chemistry, Medicine
- The Journal of organic chemistry
- 26 June 2013
Dendrodolides A-M (1-13), 13 new 12-membered macrolides, were isolated from Dendrodochium sp., a fungus associated with the sea cucumber Holothuria nobilis Selenka, which was collected from the South… Expand
N-N-Coupled Indolo-sesquiterpene Atropo-Diastereomers from a Marine-Derived Actinomycete
Four new indolo-sesquiterpenes dixiamycins A (1) and B (2), oxiamycin (3), and chloroxiamycin (4) were isolated from a marine-derived Actinomycete and characterized, together with the known compound… Expand
X‐ray Structure Determination, Absolute Configuration and Biological Activity of Phomoxanthone A
The dimeric xanthone phomoxanthone A (1a), a cytochalasin L-696,474 (2a), the corresponding 21-O-deacetyl-L-696,474 (2b), and 3-nitropropionic acid (3) were isolated from the endophytic fungus… Expand
New Bioactive 2,3‐Epoxycyclohexenes and Isocoumarins from the Endophytic Fungus Phomopsis sp. from Laurus Azorica
Six new metabolites, namely cycloepoxylactone (1a), cycloepoxytriol A (2), cycloepoxytriol B (3) and phomolactones A–C (4–6), were isolated from two cultures of the ethyl acetate soluble fraction of… Expand
Varioxepine A, a 3H-oxepine-containing alkaloid with a new oxa-cage from the marine algal-derived endophytic fungus Paecilomyces variotii.
A new 3H-oxepine-containing alkaloid, varioxepine A (1), characterized by a structurally unprecedented condensed 3,6,8-trioxabicyclo[3.2.1]octane motif, was isolated from the marine algal-derived… Expand