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Abstract: Chemoselectivity of chlorine versus methylthio (–SCH3), methylsulfinyl (–SOCH3), or methylsulfonyl [–S(O)2CH3] in either functionalization or substitution of pyridopyrimidinone and pyrimidopyrimidinone was studied. Utilization to prepare final targets for accelerated SAR studies via two-dimensional array syntheses has been demonstrated in both systems. [Copyright &y& Elsevier]

Inhibition of LRRK2 kinase activity with small molecules has emerged as a potential novel therapeutic treatment for Parkinson’s disease. Herein we disclose the discovery of a 4-ethoxy-7 H -pyrrolo[2,3- d ]pyrimidin-2-amine series as potent LRRK2 inhibitors identified through a kinase-focused set screening. Optimization of the physicochemical properties and kinase selectivity led to the discovery of compound 7 , which exhibited potent in vitro inhibition of LRRK2 kinase activity, good physicochemical properties and kinase selectivity across the kinome. Moreover, compound 7 was able to penetrate into the CNS, and in vivo pharmacology studies revealed significant inhibition of Ser935 phosphorylation in the brain of both rats (30 and 100 mg/kg) and mice (45 mg/kg) following oral administration. [ABSTRACT FROM AUTHOR]

Abstract: A novel and efficient route to 4-substituted-pyrido[2,3-d]pyrimidin-7-ones is described resulting in arrays of compounds with biological interest. [Copyright &y& Elsevier]