Anthochlor Pigments. VIII. The Pigments of Coreopsis grandiflora, Nutt. III.

TA Geissman, W Mojé

Index: Geissman; Moje Journal of the American Chemical Society, 1951 , vol. 73, p. 5765,5767

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Citation Number: 40

Abstract

The structures assigned to leptosin (I) and leptosidin (11), isolated from Coreopsis grandifEora, Nutt.'have to the present time rested upon the synthesis of leptosidin trimethyl ether2 and upon color reactions by the interpretation of which the locations of the methoxyl and glucosidoxyl groups were chosen. The structures of the naturallyoccurring pigments have now been established by the total synthesis of I and I1 and have been found to be ...