Abstract

A series of new 5H-pyridobenzazepine and pyridobenzothiepine derivatives was synthesized by Pd-catalyzed formation of C-N and C-S bonds. All synthesized compounds were tested for their in vitro antimicrobial activity. The 5H-pyridobenzazepine derivatives showed better antibacterial and antifungal activity than corresponding 5H-dipyridoazepine analogs. Among the synthesized azepines, derivative 8 displayed potent activity against tested bacteria (MIC = 39-78 ?g/mL), while azepine 12 showed promising antifungal activity (MIC = 156-313 ?g/mL). The synthesized thiepine derivatives exhibited weak antibacterial activity, but showed pronounced antifungal activity.

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