Structure-activity relationship studies and pharmacological characterization of N5-heteroarylalkyl-substituted-2-(2-furanyl)thiazolo[5,4-d]pyrimidine-5,7-diamine-based derivatives as inverse agonists at human A2A adenosine receptor.

Abstract:

:This paper describes the synthesis and characterization of N5-(hetero)arylalkyl-substituted-thiazolo [5,4-d]pyrimidine-5,7-diamine derivatives (4-19) as novel human (h) A2A adenosine receptor (AR) inverse agonists. Competition binding and cyclic AMP assays indicate that the examined compounds behave as hA2A AR inverse agonists showing binding affinity values in the nanomolar or subnanomolar range. Notably, compounds 4, 5, 6 and 11 showed two affinity values for the hA2A ARs with the highest (KH) falling in the femtomolar range and the lowest (KL) of the nanomolar order. In addition, in cyclic AMP assays, compounds 4, 5, 6 and 11 exhibited potency (IC50) values in the picomolar range. This study has confirmed that 2-(2-furanyl)thiazolo [5,4-d]pyrimidine-5,7-diamine-based derivatives represent a unique new class of hA2A AR inverse agonists.

journal_name

Eur J Med Chem

authors

Varano F,Catarzi D,Vincenzi F,Falsini M,Pasquini S,Borea PA,Colotta V,Varani K

doi

10.1016/j.ejmech.2018.06.020

subject

Has Abstract

pub_date

2018-07-15 00:00:00

pages

552-561

eissn

0223-5234

issn

1768-3254

pii

S0223-5234(18)30511-7

journal_volume

155

pub_type

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