Anthochlor Pigments of Cosmos sulphureus, Coreopsis lanceolata and C. saxicola

Journal of the American Chemical Society (Impact Factor: 12.11). 04/1953; 75(8). DOI: 10.1021/ja01104a036


From the ray flowers of Cosmos sulphureus, a new anthochlor glycoside, sulphurein, has been isolated, and its constitution established as being the 6-glucoside of sulphuretin (3′,4′,6-trihydroxybenzalcoumaranone). Also isolated from the same plant was coreopsin, previously reported by Geissman and co-workers to be a glucoside of butein (3,4,2′,4′-tetrahydroxychalcone). The structure of coreopsin has now been determined to be the 4′-glucoside of butein. From the ray flowers of Coreopsis lanceolata and C. saxicola, a new chalcone glucoside, lanceolin, has been isolated. Lanceolin is considered to be the 4′-glucoside of lanceoletin (2′,4′,3,4-tetrahydroxy-3′-methoxychalcone). Leptosin, previously obtained by Geissman from C. grandiflora, has now also been obtained and identified from C. lanceolata and C. saxicola. Leptosin is the 6-glucoside of leptosidin (3′,4′,6-trihydroxy-7-methoxybenzalcoumaranone).

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