Zobrazeno 1 - 10
of 22
pro vyhledávání: '"Robert Łysek"'
Autor:
F. I. Javier Pastor, Julia Sanz-Aparicio, Beatriz González, Oscar Gallardo, Julio Polaina, Pablo Isorna, Pierre Vogel, Pilar Diaz, Robert Łysek
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
instname
Digital.CSIC: Repositorio Institucional del CSIC
Consejo Superior de Investigaciones Científicas (CSIC)
instname
Digital.CSIC: Repositorio Institucional del CSIC
Consejo Superior de Investigaciones Científicas (CSIC)
13 pags, 6 figs, 2 tabs
Paenibacillus barcinonensis is a soil bacterium bearing a complex set of enzymes for xylan degradation, including several secreted enzymes and Xyn10B, one of the few intracellular xylanases reported to date. The crystal s
Paenibacillus barcinonensis is a soil bacterium bearing a complex set of enzymes for xylan degradation, including several secreted enzymes and Xyn10B, one of the few intracellular xylanases reported to date. The crystal s
Autor:
Sylvain Favre, Robert Łysek, Pierre Joseph Marcel Jung, Anthony Cornelius O'sullivan, Catherine Schütz, Christian Pillonel, Imma Clotet-Codina, Thomas Krülle, José A. Esté, Pierre Vogel
Publikováno v:
Bioorganic & Medicinal Chemistry. 14:6255-6282
A solid-phase synthesis of new N-substituted valienamines has been developed and new synthesis of (±)-conduramine F-1, (−)-conduramine F-1, and (+)- ent -conduramine F-1 is presented, together with the preparation of N-benzylated conduramines F-1.
Publikováno v:
Helvetica Chimica Acta. 88:2788-2811
(−)- and (+)-Conduramine B-1 ((−)- and (+)-5, resp.) have been derived from (+)- and (−)-7-oxabicyclo[2.2.1]hept-5-en-2-one (‘naked sugars’ of the first generation). Although (−)-5 imitates the structure of β-glucosides, it does not inhi
Publikováno v:
Bioorganic & Medicinal Chemistry Letters. 15:3071-3075
The 'naked sugars' (+)- and (-)-7-oxabicyclo[2.2.1]hept-5-en-2-one have been converted into (-)-conduramine B-1 ((-)-3) and its enantiomer (+)-3, respectively. They have been condensed with a variety of aldehydes in the presence of NaBH(OAc)(3). The
Publikováno v:
European Journal of Organic Chemistry. 2004:4177-4187
The 3-O- and 5-O-(Z)-propenyl ethers derived from 1,2-O-isopropylidene-α-D-xylo- and glucofuranoses, respectively, were attached to the Merrifield, MPPC and NCPSC resins using alkylsulfonyl linkers. The [2+2]-cycloaddition of chlorosulfonyl isocyana
Publikováno v:
Tetrahedron Letters. 44:7541-7544
Propargyl ethers treated with dimsyl anion in DMSO at 80–100°C undergo terminal methylenation to afford corresponding (E) 1-alkoxy-1,3-butadienes. The reaction proceeds via an alkoxy-allene.
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 178:327-340
Chiral formates derived from propane-1,2-diol, 1,2- O -isopropylidene- f - D -xylo- and f - D -gluco-furanoses were subjected to treatment with cyclopentadienyl [tris(trimethylsilylmethyl)] titanium (IV). A mixture of the corresponding ( E )- and ( Z
Publikováno v:
Tetrahedron. 57:1301-1309
[2+2]Cycloaddition of CSI to 5-O-protected-3-O-allenyl-1,2-O-isopropylidene-α- d -xylofuranoses 8 and 9 gave respective β-lactams 10–13 having an exo-propylidene group, in moderate stereoselectivity. Compounds 10, 11 and tetracyclic cephams 14, 1
Publikováno v:
Synthetic Communications. 31:2795-2802
p-Pivaloyloxybenzenesulfonyl and methylsulfonyl residues were used as linkers to attach secondary alcohols to Wang resin and to Merrifield resin, respectively. p-Pivaloyloxybenzenesulfonates of alcohols were deprotected at the phenolic group and coup
Autor:
Kinga Suwinska, Zofia Urbańczyk-Lipkowska, Robert Łysek, Zbigniew Kałuża, Marek Chmielewski, Jadwiga Frelek, Bartłomiej Furman
Publikováno v:
Tetrahedron: Asymmetry. 11:3131-3150
The direction and magnitude of asymmetric induction in the [2+2] cycloaddition of chlorosulfonyl isocyanate to 3-O-allenyl-α- d -xylofuranoses was investigated. It is shown that gem terminal dimethylallenes react more readily than methyl free congen