Abstract
Current approaches to the synthesis of 4-arylcoumarins (neoflavones) are reviewed. This is an important group of O-containing natural flavonoids that are widely used not only to prepare natural and synthetic neoflavone analogs but also to design compound libraries based on 4-arylcoumarins for biological activity studies. The use of new transition-metal catalysts and unconventional activation methods for cyclization of the coumarin system, arylation of activated coumarins, and direct arylation of unactivated coumarins are discussed.
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