Conversion of indole to oxindole under methanogenic conditions

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Conversion of indole to oxindole under methanogenic conditions.

When indole was incubated under methanogenic conditions with an inoculum of sewage sludge, the chemical was metabolized with 10 days and temporary formation of an intermediate was observed. The metabolite was isolated by thin-layer chromatography and determined to be 1,3-dihydro-2H-indol-2one (oxindole) by UV spectroscopy (lambdaMAX, 247 nm) and mass spectrometry (m/z, 133). The methane produce...

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Peroxide oxidation of indole to oxindole by chloroperoxidase catalysis.

In the presence of chloroperoxidase, indole was oxidized by H2O2 to give oxindole as the major product. Under most conditions oxindole was the only product formed, and under optimal conditions the conversion was quantitative. This reaction displayed maximal activity at pH 4.6, although appreciable activity was observed throughout the entire pH range investigated, namely pH 2.5-6.0. Enzyme satur...

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Fe3O4 nanoparticles as a recyclable catalyst in the conversion of indole to isatin

Oxidation reaction of indole to isatin was performed in the presence of Fe3O4 nanoparticles (as catalyst) and commercial grade perhydrol (as oxidant). Magnetite nanoparticles were synthesized via chemical precipitation method and characterized by XRD and TEM techniques. The efficiency of reaction was obtained from GC analysis of the mixture. The catalyst was easily separated from the reaction m...

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Methanogenic conversion of 3-s-methylmercaptopropionate to 3-mercaptopropionate.

Anaerobic metabolism of dimethylsulfoniopropionate, an osmolyte of marine algae, in anoxic intertidal sediments involves either cleavage to dimethylsulfide or demethylation to 3-S-methylmercaptopropionate (MMPA) and subsequently to 3-mercaptopropionate. The methanogenic archaea Methanosarcina sp. strain MTP4 (DSM 6636), Methanosarcina acetivorans DSM 2834, and Methanosarcina (Methanolobus) sici...

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ژورنال

عنوان ژورنال: Applied and Environmental Microbiology

سال: 1987

ISSN: 0099-2240,1098-5336

DOI: 10.1128/aem.53.1.180-182.1987