Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Henri Veschambre"'
Autor:
Martine Sancelme, Céline Tixier, N. Truffaut, Henri Veschambre, Pascale Widehem, Selim Ait-Aissa
Publikováno v:
Chemosphere. 46:527-534
A bacterial strain able to transform diuron was isolated from a soil by enrichment procedures. Strain isolation was realized by plating on minimal-agarose medium spread with this herbicide and selecting the colonies surrounded by a clear thin halo. O
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ae9abc695a22143606e9b6fc470e660b
https://doi.org/10.1016/s0045-6535(01)00192-8
https://doi.org/10.1016/s0045-6535(01)00192-8
Publikováno v:
Environmental Toxicology and Chemistry. 20:1381-1389
The degradation products of diuron (photoproducts and metabolites), already described in the literature, were synthesized in order to carry out further investigations. Their ecotoxicity was determined using the standardized Microtox® test, and most
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8207d6522b0104d9a2c3b01410fac015
https://doi.org/10.1002/etc.5620200701
https://doi.org/10.1002/etc.5620200701
Autor:
Henri Veschambre, Dominique Crestia, Colette Demuynck, Laurence Hecquet, Christine Guérard, Jean Bolte
Publikováno v:
Tetrahedron: Asymmetry. 12:869-876
Substituted acrylonitrile and ethyl acrylate bearing a masked α-hydroxyaldehyde were easily synthesised by a Barbier type reaction between the monoacetal of glyoxal and bromomethyl acrylonitrile or ethyl bromomethyl acrylate. We prepared these inter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b7d2bc5cbbdef8595ab335ecae6ddc3e
https://doi.org/10.1016/s0957-4166(01)00155-0
https://doi.org/10.1016/s0957-4166(01)00155-0
Publikováno v:
Tetrahedron: Asymmetry. 11:2211-2219
An improved enantioselective synthesis (five steps, 37–44% yield versus seven to 10 steps, 13.5 and 12% yield, respectively) of both enantiomers of keto-protected 4-amino-2-pentanone has been realized, the key step being the microbiological reducti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a955d2f20d02dab2d08f28f5bf6cd15
https://doi.org/10.1016/s0957-4166(00)00167-1
https://doi.org/10.1016/s0957-4166(00)00167-1
Autor:
Henri Veschambre, Yves Troin, Vassiliki Papastergiou, Pascale Besse, Jean-Louis Canet, Stephane Ciblat
Publikováno v:
Tetrahedron: Asymmetry. 11:2221-2229
A diastereospecific intramolecular Mannich-type reaction, involving enantiopure amine 4 and achiral aldehydes, is employed as the key step of an efficient total enantioselective synthesis of five piperidine alkaloids.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::11ef37cf697985c75cca60c29df715e4
https://doi.org/10.1016/s0957-4166(00)00162-2
https://doi.org/10.1016/s0957-4166(00)00162-2
Autor:
Landoald Twagilimana, Henri Veschambre, Jacques Bohatier, Martine Sancelme, Céline Tixier, Philippe Bogaerts, Frédérique Bonnemoy, Annie Cuer
Publikováno v:
Pest Management Science. 56:455-462
Microbial degradation, organic synthesis and ecotoxicology were used to investigate the fate of diuron after spreading on soils. Quantitative biodegradation assays were performed with fungal strains, showing that diuron was degraded but not entirely
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16bdf5faefc711e218cf97a6a245d16a
https://doi.org/10.1002/(sici)1526-4998(200005)56:5<455::aid-ps152>3.0.co
https://doi.org/10.1002/(sici)1526-4998(200005)56:5<455::aid-ps152>3.0.co
Autor:
Guy Mousset, Marc Payard, Pierre Palvadeau, Genevieve Baziard-Mouysset, Kamal Boubekeur, Pascale Besse, Henri Veschambre
Publikováno v:
Tetrahedron: Asymmetry. 10:4745-4754
From the microbiological reductions of 2-acetyl or 2-benzoylchromen-4-one both enantiomers of the corresponding alcohols were obtained with high enantiomeric excess. The absolute configurations were determined directly by an X-ray structural determin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6826d21c2661fadeddc1d229096b84f7
https://doi.org/10.1016/s0957-4166(99)00558-3
https://doi.org/10.1016/s0957-4166(99)00558-3
Publikováno v:
Journal de Chimie Physique et de Physico-Chimie Biologique. 96:1624-1628
La biodegradation de la morpholine et de la thiomorpholine par Mycobacterium aurum MO1, en presence d'un inhibiteur specifique de P450, la metyrapone, a ete suivie par RMN 1 H in situ. Au cours de ces experiences, des signaux inattendus sont apparus.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8dd1ed9445d3a5d0ebbb4f6f9acc18d4
https://doi.org/10.1051/jcp:1999240
https://doi.org/10.1051/jcp:1999240
Autor:
Pascale Besse, Jacques Gelas, Henri Veschambre, Yves Troin, Jean-Louis Canet, Stephane Ciblat
Publikováno v:
Tetrahedron: Asymmetry. 10:2225-2235
A highly diastereoselective intramolecular Mannich reaction involving enantiopure α-methylamine 7 and achiral aldehydes is employed to prepare enantiomerically pure 2,6- cis -disubstituted piperidines. This methodology provides an efficient and sele
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::411c0768398eb089530c74b2301835a8
https://doi.org/10.1016/s0957-4166(99)00226-8
https://doi.org/10.1016/s0957-4166(99)00226-8
Publikováno v:
Tetrahedron: Asymmetry. 10:2213-2224
An acetal protected 4-amino-2-pentanone was synthesised by two different routes in 10 and seven steps, respectively, the key step being a microbiological reduction. Both enantiomers of the amine were obtained enantiomerically pure.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa23deb2a8e0e97e473224f0310d62c5
https://doi.org/10.1016/s0957-4166(99)00234-7
https://doi.org/10.1016/s0957-4166(99)00234-7