RESUMEN
We report herein the discovery, structure guided design, synthesis and biological evaluation of a novel class of JAK2 inhibitors. Optimization of the series led to the identification of the potent and orally bioavailable JAK2 inhibitor 28 (NMS-P953). Compound 28 displayed significant tumour growth inhibition in SET-2 xenograft tumour model, with a mechanism of action confirmed in vivo by typical modulation of known biomarkers, and with a favourable pharmacokinetic and safety profile.
Asunto(s)
Antineoplásicos/farmacología , Janus Quinasa 2/antagonistas & inhibidores , Neoplasias Experimentales/tratamiento farmacológico , Inhibidores de Proteínas Quinasas/farmacología , Pirimidinas/farmacología , Pirroles/farmacología , Animales , Antineoplásicos/síntesis química , Antineoplásicos/química , Línea Celular Tumoral , Proliferación Celular/efectos de los fármacos , Cristalografía por Rayos X , Relación Dosis-Respuesta a Droga , Ensayos de Selección de Medicamentos Antitumorales , Humanos , Janus Quinasa 2/metabolismo , Ratones , Ratones SCID , Modelos Moleculares , Estructura Molecular , Neoplasias Experimentales/patología , Inhibidores de Proteínas Quinasas/síntesis química , Inhibidores de Proteínas Quinasas/química , Pirimidinas/síntesis química , Pirimidinas/química , Pirroles/síntesis química , Pirroles/química , Relación Estructura-Actividad , Especificidad por SustratoRESUMEN
[reaction: see text] 6-Phenanthridinones and their heterocyclic analogues were synthesized through a one-pot procedure based on consecutive Pd-catalyzed aryl-aryl and N-aryl coupling from iodoarenes ortho-substituted by electron-releasing substituents and amides of o-bromoarene- and heteroarenecarboxylic acids.
RESUMEN
A catalytic synthesis of condensed pyridones starting from o-bromoaromatic carboxamides is reported using Pd(OAc)2/TFP as catalyst, K2CO3 as a base in DMF at 105 degrees C. Under these conditions an unprecedented reaction sequence occurs leading to condensed pyridones in 23-86% yield. The proposed pathway proceeds through palladacycle-catalyzed homocoupling of the bromoamide, followed by intramolecular carbon-nitrogen bond-forming reaction with the carbon atom bearing the aminocarbonyl group, which is easily eliminated under palladium catalysis.