Asunto(s)
Daño del ADN/efectos de la radiación , Fibroblastos/efectos de la radiación , Envejecimiento de la Piel/genética , Piel/efectos de la radiación , Células Cultivadas , Fibroblastos/fisiología , Humanos , Piel/citología , Envejecimiento de la Piel/efectos de la radiación , Rayos UltravioletaRESUMEN
Organic impurities in compound libraries are known to often cause false-positive signals in screening campaigns for new leads, but organic impurities do not fully account for all false-positive results. We discovered inorganic impurities in our screening library that can also cause positive signals for a variety of targets and/or readout systems, including biochemical and biosensor assays. We investigated in depth the example of zinc for a specific project and in retrospect in various HTS screens at Roche and propose a straightforward counter screen using the chelator TPEN to rule out inhibition caused by zinc.
RESUMEN
A new class of bicyclic pyrrolopyrimidine-based Janus kinase 3 (JAK-3) inhibitors are described. Many of these inhibitors showed low nanomolar activity against JAK-3.
Asunto(s)
Janus Quinasa 3/antagonistas & inhibidores , Pirimidinas/síntesis química , Pirroles/síntesis química , Enfermedades Autoinmunes/tratamiento farmacológico , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Humanos , Inmunidad/efectos de los fármacos , Janus Quinasa 2/antagonistas & inhibidores , Pirimidinas/farmacología , Pirroles/farmacología , Relación Estructura-ActividadRESUMEN
A new class of pyrimidine-based Janus tyrosine kinase 3 (JAK3) inhibitors are described. Many of these inhibitors showed low nanomolar activity against JAK3.
Asunto(s)
Janus Quinasa 3/antagonistas & inhibidores , Pirimidinas/química , Pirimidinas/farmacologíaRESUMEN
The 13-step synthesis of (+)-isoschizandrin reported herein features a samarium(II) iodide-promoted 8-endo ketyl-olefin coupling to assemble the eight-membered ring present in the target concomitantly with the required functionality and stereochemistry. In constructing (+)-isoschizandrin as a single atropisomer, the synthesis utilizes a kinetic resolution of a seven-membered lactone using a CBS-oxazaborolidine.