Arzneimittelforschung 2003; 53(4): 266-271
DOI: 10.1055/s-0031-1297107
Antibiotics · Antiviral Drugs · Chemotherapeutics · Cytostatics
Editio Cantor Verlag Aulendorf (Germany)

Synthesis and HIV-1 Reverse Transcriptase Inhibitor Activity of Some 2,5,6-Substituted Benzoxazole, Benzimidazole, Benzothiazole and Oxazolo(4,5-b)pyridine Derivatives

Ayśegül Akbay
a   Ankara University, Faculty of Medicine, Department of Biochemistry, Ankara, Turkey
,
İIlkay Ören
b   Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Tandogan, Ankara, Turkey
,
Özlem Temiz-Arpacı
b   Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Tandogan, Ankara, Turkey
,
Esin Akı-Sener
b   Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Tandogan, Ankara, Turkey
,
Ismail Yalcçın
b   Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Tandogan, Ankara, Turkey
› Author Affiliations
Further Information

Publication History

Publication Date:
25 December 2011 (online)

Summary

In this study, the synthesis of some benzoxazoles and their analogues were described and their antiviral activities were studied together with the previously synthesized 2,5,6-trisubstituted benzoxazole, benzothiazole, benzimidazole and oxazolo(4,5-b)pyridine derivatives. The reverse transcriptase (RT) inhibitory activity of these compounds was determined using a commercial kit and assay system which utilizes the scintillation proximity assay principle. The results are concentration at which the compound inhibits RT activity by 50 %). The compounds inhibited the in vitro binding of thymidine to the RT enzyme exhibiting IC50 values between 6.3 × 105 µmol/l-0.34 µmol/l and their activities were compared to some standard drugs such as 3’-azido-2’,3’-dideoxythymidine triphosphate and dideoxythymidine triphosphate.

Zusammenfassung

Synthese von 2,5,6-substituierten Benzoxazol-, Benzimidazol-, Benzothiazolund Oxazolo(4,5-b)Pyridin-Derivaten und Bestimmung ihrer HIV-1 Reverse Transkriptase-inhibitorischen Wirkung

In der vorliegenden Studie wird die Synthese einiger Benzoxazole und ihrer Derivate sowie ihre antivirale Aktivität zusammen mit der Wirkung der bereits früher synthetisierten 2,5,6-trisubstituierten Benzoxazol-, Benzothiazol-, Benzimidazolund Oxazol(4,5-b)Pyridin-Derivative beschrieben. Die inhibitorischen Wirkungen dieser Verbindungen auf die Reverse Transkriptase (RT) wurden mit einem kommerziell erhältlichen Kit bestimmt, welches das Szintillations-Annäherungsprinzip verwendet. Die Ergebnisse werden in Form von IC50-Werten (d. h. diejenige Konzentration, bei der die Verbindungen die Aktivität der Reversen Transkriptase um 50 % herabsetzen) präsentiert. Die Verbindungen hemmen in vitro die Bindung von Thymidin an die RT mit IC50-Werten zwischen 6.3x105 µmol/l und 0.34 (mol/l. Die Wirkungen wurden mit denjenigen der Standardsubstanzen 3’-Azido-2’,3’-dideoxythymidintriphosphat und Dideoxythymidintriphosphat verglichen.