Cover Picture: Stereo‐ and Regioselective Phyllobilane Oxidation in Leaf Homogenates of the Peace Lily ( Spathiphyllum wallisii) : Hypothetical Endogenous Path to Yellow Chlorophyll Catabolites (Chem. Eur. J. 1/2015)
2014; Wiley; Volume: 21; Issue: 1 Linguagem: Inglês
10.1002/chem.201490218
ISSN1521-3765
AutoresClemens Vergeiner, Markus Ulrich, Chengjie Li, Xiujun Liu, Thomas Müller, Bernhard Kräutler,
Tópico(s)Cassava research and cyanide
ResumoChlorophyll is broken down in leaves during Fall to colorless tetrapyrroles, so-called phyllobilanes, which are degraded further in leaves into yellow oxidation products. The hypothetical "missing link" between the colorless and the yellow catabolites has now appeared on the scene, as described in the Full Paper by B. Kräutler et al. on page 136 ff. Chlorophyll is broken down in leaves during Fall to colorless tetrapyrroles, so-called phyllobilanes, which are degraded further in leaves into yellow oxidation products. The hypothetical "missing link" between the colorless and the yellow catabolites has now appeared on the scene, as described in the Full Paper by B. Kräutler et al. on page 136 ff. Palladium Catalysis In this review the stereochemistry of palladium-catalyzed addition of nucleophiles to alkenes is discussed, and examples of these reactions in organic synthesis are given. Most of the reactions discussed involve oxygen and nitrogen nucleophiles; the Wacker oxidation of ethylene has been reviewed in detail. For more details, see the Review article by P. Kočovský and J.-E. Bäckvall on page 36 ff.1 Coordination Chemistry The coordination of a geminal phosphorus–aluminum Lewis pair to organo-gold complexes leads to unprecedented Au→Al interactions, which have been authenticated by X-ray diffraction and analyzed by DFT calculations. For more details see the Communication by D. Bourissou et al. on page 74 ff.1 Molecular Recognition In their Full Paper on page 126 ff., G. Klebe, F. Diederich et al. describe a novel series of lin-benzoguanines that target the polar ribose-34 pocket of Z. mobilis TGT with a furanosyl moiety. The preparation involved a new cyclization strategy for the lin-benzoguanine core and the highly challenging separation of the anomeric mixtures by HPLC on a chiral stationary phase. They were designed to replace a conserved water cluster and differ by the functional groups at C(2) and C(3) of the furanosyl moiety being either OH or OMe. 1
Referência(s)