View all references ] Synthesis of these compounds has generated continuous interest among chemists and biologists, [ 2–7 View all references ] because of their diverse biological activities such as hypertensive, antibacterial, antitumor, antifungal, and anti-inflammatory activities. The common method for the synthesis of flavanones and tetrahydroquinolones is intramolecular cyclization of 2′-hydroxy and 2′-amino chalcones, respectively. Various conditions (acids, bases, ...