Wessely-Moser Rearrangement

F. Wessely, G. H. Moser, Monatsh. 56, 97 (1930).

Rearrangement of flavones and flavanones possessing a 5-hydroxyl group, through fission of the heterocyclic ring and reclosure of the intermediate diaroylmethanes in the alternate direction:



Reviews: Wheeler, Record Chem. Progr. 18, 133 (1957); T. R. Seshadri, Tetrahedron 6, 169 (1959); H. D. Locksley, Fortschr. Chem. Org. Naturst. 30, 292 (1973).