Asymmetric Methods for the Synthesis of Flavanones, Chromanones, and Azaflavanones

Overview

Journal European J Org Chem

Specialty Biochemistry

Date 2012 Aug 10

PMID 22876166

Citations 22

Authors

Antoinette E Nibbs

Karl A Scheidt

Affiliations

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Abstract

Flavanones, chromanones, and related structures are privileged natural products that display a wide variety of biological activities. Although flavanoids are abundant in nature, there are a limited number of available general and efficient synthetic methods for accessing molecules of this class in a stereoselective manner. Their structurally simple architectures belie the difficulties involved in installation and maintenance of the stereogenic configuration at the C2 position, which can be sensitive and can undergo epimerization under mildly acidic, basic, and thermal reaction conditions. This review presents the methods currently used to access these related structures. The synthetic methods include manipulation of the flavone/flavanone core, carbon-carbon bond formation, and carbon-heteroatom bond formation.

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