Abstract：
:Phenylacetic acid derivatives, methyl 2-acetyl-3,5-dihydroxyphenylacetate (1) and methyl 2-acetyl-5-hydroxy-3-methoxyphenylacetate (3); curvulin or ethyl 2-acetyl-3,5-dihydroxyphenylacetate (4), a known metabolite of Curvularia siddiqui, and 4-epiradicinol (5) have been isolated from the culture mycelia of Curvularia lunata grown on YMG, a medium consisting of yeast, malt extract and glucose. Compounds 1, 3 and 4 lack antimicrobial and antioxidant activity, but 4-epiradicinol (5) inhibited the growth of Escherichia coli, Staphylococcus aureus, Salmonella choleraesuis and Bacillus subtilis. The structures of compounds 1, 3-5 were determined by analyses of IR, MS, 1D and 2D NMR data, assisted by chemical shift comparison to related and model compounds. The relative stereochemistry of the vicinal diol in 5 was determined from the 1H NMR signals for the methyl protons of the resulting cyclic acetonide prepared from 5.
journal_name
Phytochemistryjournal_title
Phytochemistryauthors
Varma GB,Fatope MO,Marwah RG,Deadman ME,Al-Rawahi FKdoi
10.1016/j.phytochem.2006.05.032subject
Has Abstractpub_date
2006-09-01 00:00:00pages
1925-30issue
17eissn
0031-9422issn
1873-3700pii
S0031-9422(06)00301-3journal_volume
67pub_type
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