Walter B. Mors

The natural occurrence of 6-styryl-2-pyrones and their synthesis

Abstract Three representatives of a new type (IV) of natural 6-styryl-2-pyrones have been isolated from the wood of Aniba parviflora (Meissn.) Mez. Their constitutions (IVa, IVb, and IVc), proposed mainly on spectroscopic evidence, have been confirmed by synthesis.

Naturally Occurring Aromatic Derivatives of Monocyclic α-Pyrones

Condensed ring α-pyrones (coumarins and their derivatives) are widely distributed in nature and have been reviewed extensively (26, 76). In recent years the apparently much less numerous monocyclic α-pyrones have attracted considerable attention. These can be conveniently divided into two classes, according to their substituents: terpenoid and aromatic. The first include the toad poisons and squill glucosides and have already been the object of comprehensive progress reports (30, 82). On the other hand, a review of the aryl-pyrones and their partially hydrogenated derivatives is still lacking. They are the subject of the present article.