Discovery of a novel 2,3-dimethylimidazo[1,2-a]pyrazine-6-carboxamide M4 positive allosteric modulator (PAM) chemotype
作者:Kayla J. Temple、Julie L. Engers、Madeline F. Long、Katherine J. Watson、Sichen Chang、Vincent B. Luscombe、Matthew T. Jenkins、Alice L. Rodriguez、Colleen M. Niswender、Thomas M. Bridges、P. Jeffrey Conn、Darren W. Engers、Craig W. Lindsley
DOI:10.1016/j.bmcl.2019.126812
日期:2020.2
This Letter details our efforts to discover structurally unique M-4 PAMs containing 5,6-heteroaryl ring systems. In an attempt to improve the DMPK profiles of the 2,3-dimethyl-2H-indazole-5-carboxamide and 1-methyl-1H-benzo[d][1,2,3]triazole-6-carboxamide cores, we investigated a plethora of core replacements. This exercise identified a novel 2,3-dimethylimidazo[1,2-a]pyrazine-6-carboxamide core that provided improved M-4 PAM activity and CNS penetration.