Design, synthesis, and biological evaluation of novel iso-flavones derivatives as H3R antagonists

Abstract

Histamine H3 receptor (H3R), a kind of G-protein coupled receptor (GPCR), is expressed mainly in the central nervous system (CNS) and plays a vital role in homoeostatic control. This study describes the design and synthesis of a series of novel H3R antagonists based on the iso-flavone scaffold. The results of the bioactivity evaluation show that four compounds (1c, 2c, 2h, and 2o) possess significant H3R inhibitory activities. Molecular docking indicates that a salt bridge, π–π T-shape interactions, and hydrophobic interaction all contribute to the interaction between compound 2h and H3R.

Keywords

• H3R antagonist
• iso-flavone
• molecular docking