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[1,2,4]Triazolo[1,5-c]pyrimidines as adenosine receptor antagonists: Modifications at the 8 position to reach selectivity towards A3 adenosine receptor subtype.

Abstract：

:[1,2,4]Triazolo[1,5-c]pyrimidine is a promising platform to develop adenosine receptor antagonists. Here, we tried to investigate the effect of the substituent at the 8 position of [1,2,4]triazolo[1,5-c]pyrimidine derivatives on affinity and selectivity at the human A3 adenosine receptor subtype. In particular, we have introduced both esters and amides, principally with a benzylic nature. In addition, a small series of 5-substituted [1,2,4]triazolo[1,5-c]pyrimidines was designed in order to complete the structure-activity relationship analysis. Several of these new compounds showed affinity towards human A3 adenosine receptor in the low nanomolar range, with the most potent derivative of the series bringing a 4-ethylbenzylester at the 8 position (compound 18, hA3AR Ki = 1.21 nM). Docking studies performed on the synthesized compounds inside models of human A1, A2A and A3 adenosine receptors showed similar binding modes, comparable with the typical crystallographic binding mode of the inverse agonist ZM-241,385.

journal_name

Eur J Med Chem

journal_title

European journal of medicinal chemistry

authors

Federico S,Margiotta E,Salmaso V,Pastorin G,Kachler S,Klotz KN,Moro S,Spalluto G

doi

10.1016/j.ejmech.2018.08.042

subject

Has Abstract

pub_date

2018-09-05 00:00:00

pages

837-851

eissn

0223-5234

issn

1768-3254

pii

S0223-5234(18)30711-6

journal_volume

157

pub_type

杂志文章

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