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Publication Abstract from PubMed

A series of potent thienotriazolopyrimidinone-based PDE1 inhibitors was discovered. X-ray crystal structures of example compounds from this series in complex with the catalytic domain of PDE1B and PDE10A were determined, allowing optimization of PDE1B potency and PDE selectivity. Reduction of hERG affinity led to greater than a 3000-fold selectivity for PDE1B over hERG. 6-(4-Methoxybenzyl)-9-((tetrahydro-2H-pyran-4-yl)methyl)-8,9,10,11-tetrahydropyri do[4',3':4,5]thieno[3,2-e][1,2,4]triazolo[1,5-c]pyrimidin-5(6H)-one was identified as an orally bioavailable and brain penetrating PDE1B enzyme inhibitor with potent memory-enhancing effects in a rat model of object recognition memory.

Discovery of Selective Phosphodiesterase 1 Inhibitors with Memory Enhancing Properties.,Dyck B, Branstetter B, Gharbaoui T, Hudson AR, Breitenbucher JG, Gomez L, Botrous I, Marrone T, Barido R, Allerston CK, Cedervall EP, Xu R, Sridhar V, Barker R, Aertgeerts K, Schmelzer K, Neul D, Lee D, Massari ME, Andersen CB, Sebring K, Zhou X, Petroski R, Limberis J, Augustin M, Chun LE, Edwards TE, Peters M, Tabatabaei A J Med Chem. 2017 Apr 13. doi: 10.1021/acs.jmedchem.7b00302. PMID:28406621^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.