Scouting human A3 adenosine receptor antagonist binding mode using a molecular simplification approach: from triazoloquinoxaline to a pyrimidine skeleton as a key study.
The concept of molecular simplification as a drug design strategy to shorten synthetic routes, while keeping or enhancing the biological activity of the lead drug, has been applied to design new classes of human A3 adenosine receptor (AR) antagonists. Over the past decade, we have focused a part of our research on the study of AR antagonists belonging to strictly correlated classes of tricyclic compounds. One of these classes is represented by the 2-aryl-1,2,4-triazolo[4,3-a]quinoxalin-1-one derivatives, either 4-amino or 4-oxo-substituted, which were intensively investigated by evaluating the effect of different substituents on the 2-phenyl ring and on the 4-amino group. Using an in silico molecular simplification approach, a new series of easily synthesizable 2-amino/2-oxoquinazoline-4-carboxamido derivatives have been discovered, presenting high affinity and selectivity against human A3 AR.
Molecular Modeling Section, Dipartimento di Scienze Farmaceutiche, Università di Padova, via Marzolo 5, Padova, Italy.
Erika
E
Morizzo
Francesca
F
Capelli
Ombretta
O
Lenzi
Daniela
D
Catarzi
Flavia
F
Varano
Guido
G
Filacchioni
Fabrizio
F
Vincenzi
Katia
K
Varani
Pier Andrea
PA
Borea
Vittoria
V
Colotta
Stefano
S
Moro
D058918:Adenosine A3 Receptor Antagonists; D000818:Animals; D001665:Binding Sites; D001667:Binding, Competitive; D016466:CHO Cells; D006224:Cricetinae; D003412:Cricetulus; D000242:Cyclic AMP / Q000378:metabolism; D006801:Humans; D008958:Models, Molecular; D011743:Pyrimidines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D011810:Quinoxalines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D011869:Radioligand Assay; D043684:Receptor, Adenosine A3 / Q000737:chemistry / Q000378:metabolism*; D014230:Triazoles / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology
D058918:Adenosine A3 Receptor Antagonists; D011743:Pyrimidines; D011810:Quinoxalines; D043684:Receptor, Adenosine A3; D014230:Triazoles; D000242:Cyclic AMP