Synthesis, biological evaluation and SAR studies of benzimidazole derivatives as H1-antihistamine agents
摘要:
A series of benzimidazole derivatives have been designed, synthesized and evaluated for H-1 antihistamine activity. Six compounds have showed potent antihistamine H-1 activity. The primary SAR analysis indicated that benzyl or benzylidinyl substituted on the exo-nitrogen atom and C2 of the benzimidazole were significant. Further experiments indicated that compound 17d displayed excellent activity to reduce mast cell degranulation, moderate anti-PAF activity and decreased potency on hERG compared to astermizole. Hence compound 17d could serve as anti-allergic agent for further development. (C) 2012 Da Li Yin. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.