Synthesis 2023; 55(17): 2742-2756
DOI: 10.1055/s-0041-1738441
paper

Synthesis and Epoxidation of Flav-3-enes as Methodology for the Biomimetic Preparation of Flavan-3,4-diols

Jeanette van Jaarsveldt
,
Charlene Marais
,
Johannes H. van Tonder
,
Financial support by the University of the Free State and Pet Labs Pharmaceuticals (to JvJ) is greatly appreciated and acknowledged.


Abstract

Since flavonoids exhibit a remarkable number of pharmacological properties like antioxidant, anti-inflammatory, and antimicrobial activities, a great deal of work has been done on the medicinal and therapeutical application of these compounds. Despite the central role of flavan-3,4-diols in the synthesis of many other classes of flavonoids, only a few methods for the preparation of these compounds have been reported. In this paper, the results on the preparation of methoxy-substituted flavan-3,4-diols, displaying natural substitution patterns, from readily available starting materials through a 3-step process is disclosed. It is also indicated that the 4-aryl-substituted analogues can become available from the corresponding flav-3-enes if an aromatic nucleophile is added during the dimethyldioxirane (DMDO) epoxidation process.

Supporting Information



Publication History

Received: 14 February 2023

Accepted after revision: 27 April 2023

Article published online:
25 May 2023

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