ganciclovir and aristeromycin

Using the observation that the side effects of aristeromycin (carbocyclic adenosine) were reduced by removing the methylene at the center in aristeromycin where phosphorylation occurs, derivatives of carbocyclic oxetanocin A (4a), oxetanocin G (4b), and 2-aminooxetanocin A (16) lacking the 3'-methylene have been prepared in racemic form. The only viruses for which an appreciable inhibitory effect of the compounds (minimum inhibitory concentration ranging from 1 to 40 microg/mL) was noted were herpes simplex virus type 1 (HSV-1) and varicella-zoster virus (VZV). However, when directly compared for their antiviral potency against HSV-1 with their parents oxetanocin A and oxetanocin G, compounds 4a and 4b proved clearly less active.

Topics: Adenine; Adenosine; Animals; Antiviral Agents; Cells, Cultured; Giant Cells; Guanine; Herpesvirus 1, Human; Herpesvirus 3, Human; HIV-1; HIV-2; Humans; Magnetic Resonance Spectroscopy; Molecular Structure; Viruses

New carbocyclic adenosine analogues substituted at the 6'-position with fluorine, hydroxyl, methylene, or hydroxymethyl have been synthesized as potential mechanism-based inhibitors of S-adenosylhomocysteine (AdoHcy) hydrolase. The synthetic routes began with a functionalized (+/-)-azidocyclopentane 2, which was elaborated to the adenosine analogue, or with functionalized cyclopentane epoxides 11, 20, and 27, which were opened directly with adenine in the presence of base. The 6' alpha-fluoro, 6' beta-fluoro, and 6'-methylene carbocyclic adenosine analogues were potent inhibitors of AdoHcy hydrolase. None of the compounds displayed significant activity against herpes simplex virus type 1 or type 2, but several demonstrated potent inhibition of vaccinia virus replication.

Topics: Adenosine; Adenosylhomocysteinase; Animals; Antiviral Agents; Chemical Phenomena; Chemistry; Hydrolases; Rabbits; Simplexvirus; Structure-Activity Relationship; Vaccinia virus; Virus Replication