Biosynthese von Nitroverbindungen: Die enzymatische Oxidation einer Vorstufe mit Aminogruppe zu Pyrrolnitrin

Kirner, Sabine; Pée, Karl‐Heinz van

doi:10.1002/ange.19941060321

Cited by 13 publications

(4 citation statements)

References 9 publications

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“…Several biosynthetic pathways were proposed. One possibility is the direct nitration of aromatic compounds in the presence of KNO 3 in the medium [22] or by enzymatic oxidation of the amino groups [23]. Nitration can also be the result of peroxynitrite dependent or independent pathways [24,25].…”

Section: Resultsmentioning

confidence: 99%

New Aromatic Nitro Compounds from Salegentibacter sp. T436, an Arctic Sea Ice Bacterium: Taxonomy, Fermentation, Isolation and Biological Activities

et al. 2007

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Nineteen aromatic nitro compounds were isolated from the culture broth of an Artic sea ice bacterium. Four of these compounds are new and six compounds are reported from a natural source for the first time. The new natural products showed weak antimicrobial and cytotoxic activities. 2-Nitro-4-(2Ј-nitroethenyl)-phenol was the most potent antimicrobial and cytotoxic substance. Some of the compounds exhibit plant growth modulating activities. Based on its biochemical properties and the 16S rRNA gene sequence, the producing strain can be described as a distinct species within the genus Salegentibacter.

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Section: Resultsmentioning

confidence: 99%

New Aromatic Nitro Compounds from Salegentibacter sp. T436, an Arctic Sea Ice Bacterium: Taxonomy, Fermentation, Isolation and Biological Activities

et al. 2007

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“…Die einzigen vorliegenden Studien über enzymatische Nitrogruppenbildung wurden mit Haloperoxidasen durchgeführt. Diese Enzyme sind keine authentischen N‐Oxygenasen und oxidieren Aminogruppen ausschließlich unter sehr spezifischen, nichtnatürlichen Bedingungen, d. h. nur in vitro, mit einem Überschuss von H 2 O 2 und/oder in der Abwesenheit von Halogenidionen, über die Bildung von reaktiven Peroxospezies 17–19. Darüber hinaus sind Haloperoxidasen wie CPO‐P in natürlicher Umgebung nicht an der Biosynthese von Nitroverbindungen beteiligt, wie die Analyse der Pyrrolnitrin‐Biosynthese‐Gene ergab 13.…”

Section: Methodsunclassified

Sequenzielle enzymatische Oxidation von Aminoarenen zu Nitroarenen über Hydroxylamine

Winkler¹,

Hertweck²

2005

Angewandte Chemie

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Die At‐Line‐Detektion einer von der N‐Oxygenase AurF katalysierten Aminooxidation liefert den ersten Nachweis für eine schrittweise enzymatische Oxidation von Aminoarenen zu Nitroarenen über ein Hydroxylamin‐Intermediat (siehe Schema). Die sequenzielle Natur dieser Reaktion wird durch die Biotransformation des Intermediats sowie die Identifizierung eines von p‐Aminobenzoat abgeleiteten Azoxy‐Nebenproduktes gestützt.

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“…The only existing studies on enzymatic nitro group formation have been carried out with haloperoxidases. These are not genuine N‐oxygenases; they catalyze the oxidation of amino groups only under very specific, non‐natural in‐vitro conditions through the formation of reactive peroxo species, with excess H 2 O 2 and/or in the absence of halide ions 17–19. Furthermore, haloperoxidases such as CPO‐P are not naturally involved in the biosynthesis of nitro compounds, as has been revealed by the analysis genes responsible for pyrrolnitrin biosynthesis 13.…”

Section: Methodsmentioning

confidence: 99%

A Spontaneous Combustion Reaction for Synthesizing Pt Hollow Capsules Using Colloidal Carbon Spheres as Templates

Yang

Qiu

et al. 2006

Chemistry A European J

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Here we report a spontaneous combustion reaction in synthesizing Pt hollow capsules. In brief, Pt nanoparticles were loaded on the surface of colloidal carbon spheres by wet-chemical impregnation. When Pt-loaded carbon spheres were taken out of an argon-filled tube furnace at room temperature and exposed to air, they underwent spontaneous combustion. The internal carbon spheres templates were removed to leave nanostructured Pt hollow capsules. There are at least two critical conditions for the occurrence of the spontaneous combustion: the Pt particle size is below 5.8 nm, and the hydrogen content in the carbon spheres is above 2.570 wt %. Such a reaction is interesting for the preparation of metal hollow spheres and is also relevant with respect to removal of accumulated carbon on catalysts and for soot oxidation at room temperature.

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Biosynthese von Nitroverbindungen: Die enzymatische Oxidation einer Vorstufe mit Aminogruppe zu Pyrrolnitrin

Cited by 13 publications

References 9 publications

New Aromatic Nitro Compounds from Salegentibacter sp. T436, an Arctic Sea Ice Bacterium: Taxonomy, Fermentation, Isolation and Biological Activities

New Aromatic Nitro Compounds from Salegentibacter sp. T436, an Arctic Sea Ice Bacterium: Taxonomy, Fermentation, Isolation and Biological Activities

Sequenzielle enzymatische Oxidation von Aminoarenen zu Nitroarenen über Hydroxylamine

A Spontaneous Combustion Reaction for Synthesizing Pt Hollow Capsules Using Colloidal Carbon Spheres as Templates

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