Angewandte Chemie International Edition
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Cover Picture: Crystal Structure of Tricolorin A: Molecular Rationale for the Biological Properties of Resin Glycosides Found in Some Mexican Herbal Remedies (Angew. Chem. Int. Ed. 44/2004)
In traditional Mexican farming the morning glory “heavenly blue” (Ipomea tricolor Cav.) is used as a cover crop. The structure of tricolorin A, one of several phytotoxic resin glycosides present in this plant, has now been determined crystallographically. The lipopolysaccharide contains one macrolactone ring and forms channel structures, which could be responsible for the biological activity of this compound, as reported by R. Pereda-Miranda, A. Imberty, and co-workers in their Communication on page 5918 ff.
Also of Interest
R. W. Alder et al. give an overview of the thermodynamics, kinetics, and mechanisms of the dimerization of diaminocarbenes in their Review on page 5896 ff., in which they consider both experimental results and those from DFT calculations.
In their Communication on page 5914 ff., P. J. Sadler and co-workers describe how a trinuclear oxo–zirconium(iv) cluster forms in the binding site of bacterial transferrin.
The directed synthesis of two- and three-dimensional mesoporous iron oxide structures by varying the aging conditions is presented by F. Jiao and P. G. Bruce in their Communication on page 5958 ff.