Studies on the Constituents of the Plants of Illicium Species. IV. Thermal and Photochemical Reactions of Illicinone-A, a Novel Phytoquinoid from Illicium Plants

Abstract

Conversion of illicinone-A (1) to illicinole (4) and the reverse reaction (4→1) were occurred thermally and photochemically, respectively. The photochemical reaction of illicinone-A (1) led to the formation of 5 and 6, having novel carbon skeletons. The structure of 5 was established by X-ray analysis.