 Brevianamide A | |
 Brevianamide B | |
| Names | |
|---|---|
| IUPAC names
Brevianamide A: (2′R,5aR,8aS,9aR)-8,8-Dimethyl-2,3,8a,9-tetrahydrospiro[5a,9a-(epiminomethano)cyclopenta[f]indolizine-7,2'-indoline]-3',5,10(1H,6H,8H)-trione | |
| Other names
Brevianamid A; Brevianamid B | |
| Identifiers | |
 Y | |
3D model (JSmol) |
|
| ChemSpider |
 N |
PubChem CID |
|
| UNII |
Y |
| |
| Properties | |
| C21H23N3O3 | |
| Molar mass | 365.433 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Brevianamides are indole alkaloids that belong to a class of naturally occurring 2,5-diketopiperazines[1] produced as secondary metabolites of fungi in the genus Penicillium and Aspergillus.[2] Structurally similar to paraherquamides, they are a small class compounds that contain a bicyclo[2.2.2]diazoctane ring system.[3] One of the major secondary metabolites in Penicillium spores, they are responsible for inflammatory response in lung cells.[4]
Originally isolated from Pennicillum compactum in 1969, brevianamide A has shown insecticidal activity.[2][5] Further studies showed that a minor secondary metabolite, brevianamide B, has an epimeric center at the spiro-indoxyl quaternary center. Both were found to fluoresce under long-wave ultraviolet radiation. Furthermore, under irradaton, brevianamide A has been shown to isomerize to brevianamide B.
While the biosynthesis has not been conclusively elucidated, brevianamide A and B are constructed from tryptophan, proline, and an isoprene unit.[6]
The total synthesis of several brevianamides have been reported, for brevianamide-B [7] and for brevianamide-E.[8][9][10]
Tests for antibiotic effectiveness against E. coli, A. fecalis, B. subtilis, S. aureus, and P. aeruginosa were negative. Also, no inhibitory action was shown against A. niger, A. flavis, P. crustosum, F. graminearum, F. moniliforme, Alternara sp., and Cladosporium sp. However, some insecticidal activity has been shown in one study, possibly showing some use as an insecticide for food crops.[2] In mammalian (mice lung cell) studies, brevianamide A has shown to induce cytoxicity in cells.[4] Furthermore, ELISA assays showed elevated levels of tumor necrosis factor-alpha (TNF-A), macrophage inflammatory protein-2 (MIP-2), and interleukin 6 (IL-6). Therefore, brevianamide A may not be a suitable insecticide in food crops.
