Scaffold hopping and optimisation of 3’,4’-dihydroxyphenyl- containing thienopyrimidinones: synthesis of quinazolinone derivatives as novel allosteric inhibitors of HIV-1 reverse transcriptase-associated ribonuclease H
Tocco, Graziella;Esposito, Francesca;Caboni, Pierluigi;Laus, Antonio;Corona, Angela;Tramontano, Enzo
2020-01-01
Abstract
Bioisosteric replacement and scaffold hopping are powerful strategies in drug design useful for rationally modifying a hit compound towards novel lead therapeutic agents. Recently, we reported a series of thie- nopyrimidinones that compromise dynamics at the p66/p51 HIV-1 reverse transcriptase (RT)-associated Ribonuclease H (RNase H) dimer interface, thereby allosterically interrupting catalysis by altering the active site geometry. Although they exhibited good submicromolar activity, the isosteric replacement of the thio- phene ring, a potential toxicophore, is warranted. Thus, in this article, the most active 2-(3,4-dihydroxy- phenyl)-5,6-dimethylthieno[2,3-d]pyrimidin-4(3H)-one 1 was selected as the hit scaffold and several isosteric substitutions of the thiophene ring were performed. A novel series of highly active RNase H allo- steric quinazolinone inhibitors was thus obtained. To determine their target selectivity, they were tested against RT-associated RNA-dependent DNA polymerase (RDDP) and integrase (IN). Interestingly, none of the compounds were particularly active on (RDDP) but many displayed micromolar to submicromolar activity against IN.File | Dimensione | Formato | |
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2020 Tocco Scaffold hopping and optimisation of 3 4 dihydroxyphenyl containing thienopyrimidinones synthesis of quinazolinone derivatives as novel allosteric.pdf accesso aperto
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Tocco G._ J Enz In Med Chem 2020.pdf accesso aperto
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