New Aza-Dipeptide Analogues as Potent and Orally Absorbed HIV-1 Protease Inhibitors: Candidates for Clinical Development
作者:Guido Bold、Alexander Fässler、Hans-Georg Capraro、Robert Cozens、Thomas Klimkait、Janis Lazdins、Jürgen Mestan、Bernard Poncioni、Johannes Rösel、David Stover、Marina Tintelnot-Blomley、Figan Acemoglu、Werner Beck、Eugen Boss、Martin Eschbach、Thomas Hürlimann、Elvira Masso、Serge Roussel、Katharina Ucci-Stoll、Dominique Wyss、Marc Lang
DOI:10.1021/jm970873c
日期:1998.8.1
On the basis of previously described X-ray studies of an enzyme/aza-dipeptide complex,(8) azadipeptide analogues carrying N-(bis-aryl-methyl) substituents on the (hydroxethyl)hydrazine moiety have been designed and synthesized as HIV-1 protease inhibitors. By using either equally (12) ororthogonally (13) protected dipeptide isosteres, symmetrically and asymmetrically acylated aza-dipeptides can be synthesized. This approach led to the discovery of very potent inhibitors with antiviral activities (ED50) in the subnanomolar range. Acylation of the (hydroxethyl)hydrazine dipeptide isostere with the L-tert-leucine derivative 29 increased the oral bioavailability significantly when compared to the corresponding L-valine or L-isoleucine derivatives. The bis(L-tert-leucine) derivatives CGP 75355, CGP 73547, CGP 75136, and CGP 75176 combine excellent antiviral activity with high blood concentration after oral administration. Furthermore, they show no cross-resistance with saquinavir-resistant strains and maintain activity against indinavir-resistant ones. Consequently they qualify for further profiling as potential clinical candidates.