US EPA

6325151 

Journal Article 

Synthesis, in vitro biological evaluation and oral bioavailability of 9-[2-(phosphonomethoxy)propyl]adenine (PMPA) prodrugs 

Arimilli, MN; Kim, CU; Dougherty, J; Mulato, A; Oliyai, R; Shaw, JP; Cundy, KC; Bischofberger, N 

1997 

Yes 

Antiviral Chemistry and Chemotherapy
ISSN: 0956-3202
EISSN: 2040-2066 

International Medical Press Ltd 

8 

6 

557-564 

English 

10.1177/095632029700800610 

WOS:A1997YJ91700010 

http://journals.sagepub.com/doi/10.1177/095632029700800610
Exit
 

Potentially orally bioavailable prodrugs of the anriretroviral agent 9-[2-phosphonomethoxy)propyl]adenine (PMPA) were evaluated. Alkyl methyl carbamates were synthesized by alkylation of PMPA with the corresponding alkyl chloromethyl carbonate and N-alkyl chloromethyl carbamate reagents. The prodrugs were evaluated for in vitro antiviral activity in addition to chemical and enzymic stability. The inhibition of human immunodeficiency virus type 1 (HIV-1) strain IIIB replication in MT-2 cells by the carbonate prodrugs was found to be 2.5-500-fold increased compared to PMPA. The alkyl methyl carbonates, except t-butyl methyl carbonate, had reasonable chemical stability at pH 2.2 and 7.4, but were rapidly converted to the corresponding monoester of PMPA in the presence of dog plasma. The alkyl methyl carbamate prodrugs such as N-t-butyl methyl carbamate were found to have high stability in vitro. Based on its chemical stability and good oral bioavailability, bis(POC)PMPA (isopropyl methyl carbonate) was chosen as a clinical candidate. 

acyclic; nucleoside; antiretroviral; alkyl methyl carbonate; prodrug; oral bioavailability; bis(POC)PMPA