Design, Synthesis, and Evaluation of Anti-HBV Activity of Hybrid Molecules of Entecavir and Adefovir: Exomethylene Acycloguanine Nucleosides and Their Monophosphate Derivatives
作者:Shuhei Imoto、Satoru Kohgo、Ryoh Tokuda、Hiroki Kumamoto、Manabu Aoki、Masayuki Amano、Nobuyo Kuwata-Higashi、Hiroaki Mitsuya、Kazuhiro Haraguchi
DOI:10.1080/15257770.2015.1037456
日期:2015.8.3
Exomethylene acycloguanine nucleosides 4, 6 and its monophosphate derivatives 5, 7, and 8 have been synthesized. Mitsunobu-type coupling of 2-N-acetyl-6-O-diphenylcarbamoylguanine (11) with primary alcohols proceeded regioselectively to furnish the desired N-9-substituted products in moderate yield. Evaluation of 4-8 for anti-HBV activity in HepG2 cells revealed that the phosphonate derivative 8 was found to exhibit moderated activity (EC50 value of 0.29 mu M), but cytotoxicity (CC50 value of 39 mu M) against the host cells was also observed.