Výsledky vyhledávání - "Jacques Taillades"

Process improvement in amino acid N-carboxyanhydride synthesis by N-carbamoyl amino acid nitrosation

Autor: Olivier Lagrille, Laurent Boiteau, Jacques Taillades, Jean-Christophe Rossi, Grégoire Danger

Publikováno v: Amino Acids
Amino Acids, Springer Verlag, 2009, 36 (2), pp.341-347. ⟨10.1007/s00726-008-0090-1⟩

Amino acid N-carboxyanhydrides (NCA), convenient monomer for polypeptide synthesis, are easily prepared in high purity as the result of N-carbamoyl amino acids (CAA) nitrosation by gaseous NOx (4:1 NO + O2 mixture, or NOCl) in toluene. Removal of pol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7ee3885524bee0d37fcef914dc736316
https://doi.org/10.1007/s00726-008-0090-1

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From prebiotic macromolecules to synthetic polypeptides: a new, efficient synthesis of α-amino acidN-carboxyanhydrides (NCAs)

Autor: Laurent Boiteau, François Schué, Jacques Taillades, Auguste Commeyras, Olivia Giani, Olivier Lagrille, Hélène Collet, Willy Vayaboury

Publikováno v: Polymer International. 51:1037-1040

While polypeptide materials present important application potentialities, the expense of amino acid N-carboxyanhydride (NCA) monomers strongly limits their applications. We present here a new, promising synthetic route to NCA through N-carbamoylamino

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e038e24079bcbbc781bb4cddbc271b11
https://doi.org/10.1002/pi.946

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Prebiotic synthesis of sequential peptides on the Hadean beach by a molecular engine working with nitrogen oxides as energy sources

Autor: Franck Selsis, Hervé Martin, Laurent Boiteau, Louis Mion, Hélène Collet, Olivier Lagrille, Odile Vandenabeele-Trambouze, Jacques Taillades, Jean-Philippe Biron, Michel Dobrijevic, Auguste Commeyras, Raphaël Plasson, Hervé Cottet

Publikováno v: Polymer International. 51:661-665

Addressing the still open question of the prebiotic origin of sequential macromolecules (peptides, nucleic acids) on the primitive Earth, we describe a molecular engine (the primary pump), which works at ambient temperature and continuously generates

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5e5ca038490b183662d8d525590c5f91
https://doi.org/10.1002/pi.1027

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A pH-dependent cyanate reactivity model: application to preparative N-carbamoylation of amino acids

Autor: Willy Vayaboury, Isabelle Beuzelin, Odile Vandenabeele-Trambouze, Jacques Taillades, Auguste Commeyras, Olivier Lagrille, Jean-Philippe Biron, Laurent Boiteau, Olivia Giani

Publikováno v: Journal of the Chemical Society, Perkin Transactions 2. :1247-1254

Recent developments in peptide synthesis have underlined the importance of optimising, on a preparative scale, the N-carbamoylation of amino acids by aqueous cyanate. To this purpose, a theoretical model of aqueous cyanate reactivity was designed. Th

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3ede00bcf1f3b454ac22cadae33f6a36
https://doi.org/10.1039/b005856o

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Solid phase decarbamoylation of monoalkylureas and N-carbamoylpeptides using gaseous NOx: A new easy deprotection reaction with minimum waste

Autor: Laurent Boiteau, Héle`ne Collet, Jacques Taillades, Auguste Commeyras

Publikováno v: Tetrahedron Letters. 40:3355-3358

Treating solid monoalkylureas (including N-carbamoylpeptides) when hydrated by ca. 1 eq. water, by gaseous NOx (nitrogen peroxide or a mixture of nitric oxide and oxygen) in stoichiometric excess, deprotects quantitatively the amino function at room

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2adcb6a4c5b0171d1c8780fb3d23d781
https://doi.org/10.1016/s0040-4039(99)00326-3

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[Untitled]

Autor: Catherine Bied, Jacques Taillades, Vlado Tabacik, Isabelle Beuzelin, Auguste Commeyras, Laurence Garrel

Publikováno v: Origins of Life and Evolution of the Biosphere. 28:61-77

Our previous kinetic and thermodynamic studies upon the reactional system HCHO/HCN/ NH3 in aqueous solutions are completed. In the assumed prebiotic conditions of the primitive earth ([HCHO] and [HCN] near 1 g L−1, T = 25 °C, pH = 8, [NH3] very lo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::856e0d5fe27878d48ea5b5abf1a8200a
https://doi.org/10.1023/a:1006566810636

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A new simple and quantitative synthesis of α-aminoacid-N-carboxyanhydrides (oxazolidines-2,5-dione)

Autor: Jacques Taillades, Louis Mion, Hélène Collet, Auguste Commeyras, Catherine Bied

Publikováno v: Tetrahedron Letters. 37:9043-9046

Nitrosation of chiral N-carbamoylaminoacids with a mixture of NO and O2 gives, with the same configuration and in quantitative yield the corresponding α-aminoacid-N-carboxyanhydrides (NCA), well known precursors of peptides. The by products of this

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::60f95f0d588ef77c12983f678d922fb3
https://doi.org/10.1016/s0040-4039(96)01974-0

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N,N‘-Methylenebis(4,5-oxazolidinedione): A Novel Route to New Copolyoxamide Precursors

Autor: V. Tabacik, Auguste Commeyras, Jacques Taillades, and F. Schué, R. Tesseidre, G. Moutou

Publikováno v: Macromolecules. 29:4792-4795

Copolyoxamide copolymers precursors XCH 2 NHCOCONHCH 2 NHCOCONHCH 2 X (X= CONH 2 , COOH, CH 2 OH) have been synthesized by reaction of N,N'-methylenebis(4,5-oxazolidinedione) with an α-aminonitrile, an α-aminoacid and ethanolamine, respectively

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bc99f027ab0842a8cf02d88391194e20
https://doi.org/10.1021/ma951491o

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Influence of a hydroalcoholic solvent on the enantioselectivity of α-amino nitrile hydration catalysed by chiral ketones

Autor: Auguste Commeyras, Pierre-Henri Lagriffoul, Ziad Tadros, Jacques Taillades

Publikováno v: J. Chem. Soc., Perkin Trans. 2. :1279-1285

The enantioselective hydration of α-aminonitriles 1, RCH(CN)NH2[1a: R = PhCH2; 1b: R = Pri; 1c: R = Ph] has been achieved in an alkaline hydroalcoholic medium in the presence of chiral ketonic catalysts. Of the different ketones used, (-)-(5R,3R,2R)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c5822907781d7009c9a4af7331862a1c
https://doi.org/10.1039/p29920001279

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Regioselective hydration and deprotection of chiral, dissymmetric iminodinitriles in the scope of asymmetric Strecker strategy

Autor: J.‐C. Rossi, Jacques Taillades, Laurent Boiteau, Marc Marull

Publikováno v: European Journal of Organic Chemistry
European Journal of Organic Chemistry, Wiley-VCH Verlag, 2007, pp.662-668. ⟨10.1002/ejoc.200600294⟩

The controlled, selective decomposition of dissymmetric iminodinitriles (DIDN) of formula RCH(CN)–NH–C(CN)R′R″ (considered as N-protected alpha-aminonitriles), is a critical issue for an original asymmetric Strecker strategy previously outlin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d56b36c161444b01c226295bf4492190
https://hal.archives-ouvertes.fr/hal-00135379

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