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Hydroxylation of carbazoles by Aspergillus flavus VKM F-1024.
Carbazole was metabolized by Aspergillus flavus VKM F-1024 forming few monohydroxylated products. The structure of metabolites was determined by TLC, GC, MS and (1)H NMR analyses. 3-HydroxycarbazoleExpand
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Screening of mycelial fungi for 7α- and 7β-hydroxylase activity towards dehydroepiandrosterone
In total, 481 fungal strains were screened for the ability to carry out 7(α/β)-hydroxylation of dehydroepiandrosterone (DHEA, 3β-hydroxy-5-androsten-17-one). Representatives of 31 genera of 15Expand
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Synthesis and cytotoxicity of oligomycin A derivatives modified in the side chain.
A novel way of chemical modification of the macrolide antibiotic oligomycin A (1) at the side chain was developed. Mesylation of 1 with methane sulfonyl chloride in the presence ofExpand
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Microbial conversion of pregna-4,9(11)-diene-17α,21-diol-3,20-dione acetates by Nocardioides simplex VKM Ac-2033D
The conversion of pregna-4,9(11)-diene-17alpha,21-diol-3,20-dione 21-acetate (I) and 17,21-diacetate (VI) by Nocardioides simplex VKM Ac-2033D was studied. The major metabolites formed from I wereExpand
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The first examples of chemical modification of oligomycin A
The first examples of chemical modification of antibiotic oligomycin A are described. The interaction of oligomycin A with hydroxylamine yielded six-membered nitrone annelated with the antibiotic atExpand
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Conversion of 1-benzoylindole by Aspergillus strains
Abstract Biotransformation of 1-benzoylindole (BI) by the strains Aspergillus flavus VKM F-1024 and Aspergillus oryzae VKM F-44 was studied. The major metabolites isolated were identified asExpand
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NMR spectra of natural coumarin derivatives
ConclusionsThe NMR spectra of nine coumarin derivatives have been studied. The results obtained may be used for purposes of structural analysis.
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New pyrano[3,4-b]indoles from 2-hydroxymethylindole and l-dehydroascorbic acid
Abstract 2-Hydroxymethylindole reacts with l -dehydroascorbic acid under mild conditions to giveExpand
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Naphthoindoles. 9. Synthesis of N-derivatives of 4,11-Dimethoxynaphtho-[2,3-f]indole-5,10-dione
N-Acetylation and several N-alkylation reactions have been carried out for the previously synthesized 4,11-dimethoxynaphtho[2,3-f]indole-5,10-dione.
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Synthesis and properties of a novel brominated oligomycin A derivative
Keywords: ATP; bromo-oligomycin A; bromotetrahydropyrane; cytotoxicity; macrolide antibiotic; oligomycin A
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