title: Synthesis and antiviral activity of 2'-substituted 9-[2-(phosphonomethoxy)ethyl]guanine analogues.
abstract: A series of 2'-substituted derivatives of 9-[2-(phosphonomethoxy)ethyl]guanine (PMEG, 1) have been synthesized and evaluated in vitro for anti-human immunodeficiency virus (HIV) activity in the XTT assay and for anti-herpes activity in the plaque reduction assay. It has been observed that the anti-HIV activity of these derivatives depends on the size and the nature of the substituent as well as the chirality at the 2'-position of PMEG. In addition, these compounds generally demonstrated greater activity against HIV than herpes viruses. The most interesting analogues which emerged from these studies are (R)-2'-(azidomethyl)-PMEG [(R)-5] and (R)-2'-vinyl-PMEG [(R)-11]. The former showed anti-HIV activity with an IC50 of 5 microM and a cytotoxicity (CC50) greater than 1.4 mM in CEM cells. The latter has an IC50 of 13 microM for anti-HIV activity and a CC50 of greater than 1.6 mM. Furthermore, we have demonstrated that replacement of the guanine base of these 2'-substituted PMEG analogues with cytosine drastically reduces anti-HIV and anti-herpes activity.
authors.affiliation: Bristol-Myers Squibb Company, Pharmaceutical Research Institute, Wallingford, Connecticut 06492-7660.
authors.forename: K L
authors.initials: KL
authors.lastname: Yu
authors.forename: J J
authors.initials: JJ
authors.lastname: Bronson
authors.forename: H
authors.initials: H
authors.lastname: Yang
authors.forename: A
authors.initials: A
authors.lastname: Patick
authors.forename: M
authors.initials: M
authors.lastname: Alam
authors.forename: V
authors.initials: V
authors.lastname: Brankovan
authors.forename: R
authors.initials: R
authors.lastname: Datema
authors.forename: M J
authors.initials: MJ
authors.lastname: Hitchcock
authors.forename: J C
authors.initials: JC
authors.lastname: Martin
mesh_terms: D000970:Antineoplastic Agents / Q000494:pharmacology; D000998:Antiviral Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D006147:Guanine / Q000031:analogs & derivatives* / Q000494:pharmacology; D008826:Microbial Sensitivity Tests; D009943:Organophosphorus Compounds / Q000138:chemical synthesis* / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D000970:Antineoplastic Agents; D000998:Antiviral Agents; D009943:Organophosphorus Compounds; C063380:9-((2-phosphonylmethoxy)ethyl)guanine; D006147:Guanine