Total Synthesis and Structure Assignment of the Anthrone C-Glycoside Cassialoin

摘要

Anthrone C-glycosides constitute an intriguing class of natural products,in which sugars are connected to an anthrone skeleton at its C10 position through a C-C bond.Cassialoin(1),a representative member of this class,was isolated from plant extracts traditionally used in Ayurvedic and Asian folk medicine,namely a heartwood of Cassia garrettiana CRAIB or the roots of Rheum emodi WALL.