Journal of Medicinal Chemistry p. 467 - 471 (1985)
Update date:2022-08-05
Topics:
Houston
Dolence
Keller
Patel-Thombre
Borchardt
A series of 9-(hydroxyalkyl)-3-deazaadenines, which are analogues of the carbocyclic derivative of 3-deazaadenosine (3-deaza-C-Adpo), were synthesized. The analogues were tested as inhibitors of bovine liver S-adenosyl-L-homocysteine (AdoHcy) hydrolase (EC 3.3.1.1) and as inhibitors of vaccinia virus (WR) replication in clone 929 mouse L cells and the results were compared to those observed for the parent compound, 3-deaza-C-Ado. 4-Amino-1-(2,3-dihydroxy-1-propyl)imidazo[4,5-c]pyridine (14), the analogue which included the 1'-, 2'- and 3'-carbons of 3-deaza-C-Ado, was the most active inhibitor toward purified AdoHcy hydrolase. The inhibitory effect of 14 (K(i) = 768 nM) on AdoHcy hydrolase was significantly less than that observed for 3-deaza-C-Ado (K(i) = 4 nM). Analogue 14 also exhibited inhibitory activity against vaccinia virus replication, but the activity was less than that observed with 3-deaza-C-Ado. 4-Amino-1-(4-hydroxy-1-butyl)imidazo[4,5-c]pyridine (15) showed little or no inhibitory activity toward AdoHcY hydrolase, but it did exhibit antiviral effects comparable to 14. These results suggest that 3-deaza-C-Ado and analogue 14 may be producing their antiviral effects by altering a critical viral methylation (e.g., methylation of the 5'-cap of viral mRNA), whereas analogue 15 may be acting through an alternative mechanism.
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