Journal of Medicinal Chemistry p. 274 - 278 (1984)
Update date:2022-08-04
Topics:
Antonini
Cristalli
Franchetti
Grifantini
Martelli
Lupidi
Riva
Structural analogues of erythro-9-(2 hydroxy-3-nonyl)adenine (EHNA), in which the adenine moiety of the molecule was modified, were prepared in order to investigate the structural requirement of EHNA as a inhibitor of adenosine deaminase (ADA). Thus, 1- and 3-deaza-EHNA and their 6-deamino analogues were synthesized and evaluated as inhibitors of ADA from calf intestine. Inhibition studies indicated that isosteric substitution of pyrimidine nitrogens by carbons could be tolerated at the enzymatic binding site. In fact, 3-deaza-EHNA was found to have an inhibitory activity comparable to EHNA itself, and 1-deaza-EHNA, though less potent, is a good inhibitor. The 6-amino group gives an important contribution to the enzymatic binding if the N1 nitrogen is also present, conferring on the compound the characteristic of a semitight inhibitor.
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