A Convenient Method for Synthesizing 2-Aryl-3-hydroxy-4-oxo-4H-1-benzopyrans or Flavonols

André Fougerousse, Emmanuel Gonzalez and Raymond Brouillard

*Laboratoire de Chimie des Polyphénols, UMR 7509 du CNRS, Université Louis Pasteur, 4, rue Blaise Pascal, 67008 Strasbourg, France

A. Fougerousse, E. Gonzalez, R. Brouillard, J. Org. Chem., 2000, 65, 583-586.

DOI: 10.1021/jo990735q

---

see article for more reactions

Abstract

A Baker-Venkataraman rearrangement followed by a quick cyclization-dehydration step and a saponification provides flavonols in good yields.

see article for more examples

---

---

Key Words

Baker-Venkataraman Rearrangement, Flavones

---

ID: J42-Y2000