The Palaearctic Hylaea fasciaria (Linnaeus, 1758) species group is revised (Lepidoptera: Geometridae, Ennominae). Four taxa are considered valid at species level: H. fasciaria (Linnaeus, 1758), H. pinicolaria (Bellier, 1861), H. compararia (Staudinger, 1894) and one new species, H. mediterranea, from Italy: Sicily, Calabria and Molise. The following taxonomic changes are proposed: Ellopia cedri...

The stereoselectivity of the Staudinger reactions involving monosubstituted ketenes with electron acceptor substituents was investigated experimentally by determination of the product stereochemistry and theoretically via DFT calculations. The results indicate that imines preferentially attack the less sterically hindered exo-side of the ketenes to generate zwitterionic intermediates. Subsequen...

Two species, Athrips albimacula Oh & Li, sp. nov. and A. lingchuana nov., are described as new; two pruinosella (Lienig Zeller, 1846) spiraeae (Staudinger, 1871), newly recorded for China. Images of adults genitalia the above four species illustrated.

Bioorthogonal reactions are chemical reactions that neither interact with nor interfere with a biological system. The participating functional groups must be inert to biological moieties, must selectively reactive with each other under biocompatible conditions, and, for in vivo applications, must be nontoxic to cells and organisms. Additionally, it is helpful if one reactive group is small and ...

Tinagma armeniacum Gaedike, sp. n. is described from Armenia. New country records are presented for anchusellum griseellum Budashkin, 2003, columbella (Staudinger, 1880) and ocnerostomella (Stainton, 1850). Nine species now known the Caucasus region.

[formula: see text] Catalytic acylation using complex transition metal salts MCo(CO)4 is demonstrated. Surprisingly, a solvent-dependent mechanistic "switch" results in a Lewis acid-based acylation mechanism in nonpolar media and a nucleophilic mechanism in polar organic media. These observations lead to the first example of a catalyzed Staudinger reaction to form beta-lactams.

Institute of Physics, University of Freiburg, 7 [email protected] Hermann Staudinger Graduate School, U Germany School of Materials Science & Engineering, Z People's Republic of China Chair of Chemical Materials Science, D Konstanz, 78464 Konstanz, Germany Institute of Macromolecular Chemistry, U Germany Freiburg Materials Research Centre, Univers † Electronic supplementary informa ...