Issue 5, 1969

Anogeissus leiocarpus gum. Part III. Interior chains of leiocarpan A

Abstract

Methylation of degraded leiocarpan A followed by reduction and hydrolysis furnishes 2,3,4-tri-O-methyl-D-xylose, 3,4,6-tri-, and 3,4-di-O-methyl-D-mannose, and 2,3-di-O-methyl-D-glucose as the major products. Acetolysis of carboxy-reduced leiocarpan A, followed by deacetylation, affords a mixture of oligosaccharides including 2-O-β-D-glucopyranosyl-D-mannose (I), 4-O-α-D-mannopyranosyl-D-glucose (II), and a series of higher oligosaccharides (III)–(VII) containing glucose and mannose residues in alternating sequences and 6-O-β-D-galactopyranosyl-D-galactose (VIII). It is concluded that the interior chains of leiocarpan A contain alternate 4-O-substituted β-D-glucuronic acid and 2-O-substituted α-D-mannopyranose residues.

Article information

Article type
Paper

J. Chem. Soc. C, 1969, 845-851

Anogeissus leiocarpus gum. Part III. Interior chains of leiocarpan A

G. O. Aspinall and J. M. McNab, J. Chem. Soc. C, 1969, 845 DOI: 10.1039/J39690000845

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Spotlight

Advertisements