[EN] COMPOUNDS AND USES FOR THE TREATMENT AND PREVENTION OF DISEASES AND CONDITIONS ASSOCIATE WITH OR AGGRAVATED BY IMPARED MITOPHAGY [FR] COMPOSÉS ET UTILISATIONS POUR LE TRAITEMENT ET LA PRÉVENTION DE MALADIES ET D'ÉTATS ASSOCIÉS À UNE MITOPHAGIE DÉFICIENTE OU AGGRAVÉS PAR CELLE-CI
Conventional Tetrakis(triphenylphosphine)palladium-Copper(I) Iodide-Catalyzed Sonogashira Coupling of Free and BOC- Protected Propargylic Amines “On Water”
作者:Bartomeu Soberats、Luis Martínez、Manuel Vega、Carmen Rotger、Antoni Costa
DOI:10.1002/adsc.200900240
日期:——
Alkynylation of aryl iodides with propargylicamines has been achieved by means of a Sonogashiracoupling using “on water” methods. The use of less than 0.2 mol% of tetrakis(triphenylphosphine)palladium [Pd(PPh3)4] and 1.5 mol% copper(I) iodide [CuI] in the presence of diisopropylethylamine (DIPEA) allows the coupling to proceed at 95 °C yielding moderate to good yields of mono-, bis-, and tris-aminoalkynylbenzene
Inhibition of <i>Streptococcus </i><i>s</i><i>uis</i> Adhesion by Dendritic Galabiose Compounds at Low Nanomolar Concentration
作者:John A. F. Joosten、Vuokko Loimaranta、Chantal C. M. Appeldoorn、Sauli Haataja、Fatna Ait El Maate、Rob M. J. Liskamp、Jukka Finne、Roland J. Pieters
DOI:10.1021/jm049476+
日期:2004.12.1
A series of mono-, di-, and tetravalent galablose (Ga1alpha1-4Gal) compounds were synthesized in good yields by coupling of a general carboxylic acid-bearing sugar building block to dendritic scaffolds based on the 3,5-di-(2-aminoethoxy)benzoic acid branching unit. Furthermore. a poly(amidoamine)- (PAMAM-) based dendritic galabioside was Synthesized containing eight galabiose units. All galabiosides were tested in a hemagglutination assay and a Surface plasmon resonance (SPR) competition assay in order to establish their potency in the binding to the bacterial Gram-positive pathogen Streptococcus suis. A monovalent cralabioside containing a short spacer was used as a reference compound in all the assays. Varations in the scaffold as well as in the spacer arms were introduced to determine their influence on the inhibition. The best inhibitor of hemagglutination was an octavalent galabioside with a minimal inhibitory concentration (MIC) of 0.3 nM, to the best of our knowledge the first, example of inhibition of bacterial binding by a soluble carbohydrate at a subnanomolar concentration.