RESUMEN
The identification of small molecule inhibitors of IRAK4 for the treatment of autoimmune diseases has been an area of intense research. We discovered novel 4,6-diaminonicotinamides which potently inhibit IRAK4. Optimization efforts were aided by X-ray crystal structures of inhibitors bound to IRAK4. Structure activity relationship (SAR) studies led to the identification of compound 29 which exhibited sub-micromolar potency in a LTA stimulated cellular assay.
Asunto(s)
Diseño de Fármacos , Quinasas Asociadas a Receptores de Interleucina-1/antagonistas & inhibidores , Niacinamida/química , Inhibidores de Proteínas Quinasas/química , Sitios de Unión , Cristalografía por Rayos X , Evaluación Preclínica de Medicamentos , Humanos , Concentración 50 Inhibidora , Quinasas Asociadas a Receptores de Interleucina-1/metabolismo , Janus Quinasa 3/química , Janus Quinasa 3/metabolismo , Conformación Molecular , Simulación de Dinámica Molecular , Niacinamida/metabolismo , Inhibidores de Proteínas Quinasas/metabolismo , Estructura Terciaria de Proteína , Relación Estructura-ActividadRESUMEN
Two reaction sequences commencing with different starting materials were successfully employed for the synthesis of frondosin A analogues, including (+/-)-frondosin A dimethyl ether. Construction of the bicyclo[5.4.0]undecane core in each case was achieved through an expedient microwave-assisted tandem 5-exo cyclization--Claisen rearrangement process.