Phosphine-Free Palladium Catalytic System for the Selective Direct Arylation of Furans or Thiophenes bearing Alkenes and Inhibition of Heck-Type Reaction
作者:Lu Chen、Julien Roger、Christian Bruneau、Pierre H. Dixneuf、Henri Doucet
DOI:10.1002/adsc.201100193
日期:2011.10
Palladium acetate associated to potassium carbonate as catalyticsystem has been found to efficiently catalyse the direct 5-arylation of furans or thiophenesbearing enal, enone or acrylate functions at carbon C-2, and to inhibit the Heck-typereaction. The nature of the base is crucial to control the selectivity of the arylation. In the presence of electron-deficient aryl bromides and potassium carbonate
Development of Molecular Probes for Second-Site Screening and Design of Protein Tyrosine Phosphatase Inhibitors
作者:Jesus Vazquez、Lutz Tautz、Jennifer J. Ryan、Kristiina Vuori、Tomas Mustelin、Maurizio Pellecchia
DOI:10.1021/jm061481l
日期:2007.5.1
phosphotyrosine phosphatases (PTPs) using NMR-based techniques. The compounds have been tested against a panel of PTPs to assess their ability to inhibit a broad spectrum of these phosphatases. The utility of the derived compounds is illustrated with the phosphatase YopH, a bacterial toxin from Yersinia pestis. Novel chemical fragments were identified during an NMR-basedscreen for compounds that are capable