Zobrazeno 1 - 10
of 103
pro vyhledávání: '"Christian Logemann"'
Autor:
Longcheng Hong, Sebastian Ahles, Andreas H. Heindl, Gastelle Tiétcha, Andrey Petrov, Zhenpin Lu, Christian Logemann, Hermann A. Wegner
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 14, Iss 1, Pp 618-625 (2018)
We report an air-stable bisboron complex as an efficient catalyst for the inverse electron-demand Diels–Alder (IEDDA) reaction of 1,2-diazine as well as 1,2,4,5-tetrazine. Its stability towards air and moisture was demonstrated by NMR studies enabl
Externí odkaz:
https://doaj.org/article/169df171f80d478dbd92d444479ecd64
Autor:
Peter R. Schreiner, Derck Schlettwein, Zhenpin Lu, Henrik Quanz, Christian Logemann, Hermann A. Wegner, Georg Albrecht, Julia Ruhl
Publikováno v:
Angewandte Chemie International Edition. 58:4259-4263
We present a new concept to control the conformations of molecules in the excited state through harvesting negative hyperconjugation. The strategy was realized with the 2,3,1,4-benzodiazadiborinane scaffold, which was prepared by a new synthetic proc
Autor:
Marta Larrosa, Radim Hrdina, Christian Logemann, Felix Wech, Benjamin Zonker, Jannis Volkmann, Heike Hausmann
Publikováno v:
Chemistry - A European Journal. 24:6269-6276
We have developed a synthesis of 1,2-substituted adamantane carboxylic acids and further bridged cycloalkanes (cage compounds) by palladium acetate-catalyzed C-H bond oxidation. Acetoxylation of cycloalkane framework was performed using picolylamide
Autor:
Gastelle Tiétcha, Andrey Petrov, Christian Logemann, Sebastian Ahles, Zhenpin Lu, Longcheng Hong, Hermann A. Wegner, Andreas H. Heindl
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 14, Iss 1, Pp 618-625 (2018)
Beilstein Journal of Organic Chemistry
Beilstein Journal of Organic Chemistry
We report an air-stable bisboron complex as an efficient catalyst for the inverse electron-demand Diels–Alder (IEDDA) reaction of 1,2-diazine as well as 1,2,4,5-tetrazine. Its stability towards air and moisture was demonstrated by NMR studies enabl
Autor:
Sebastian Beeck, Henrik Quanz, Olaf Burghaus, Hermann A. Wegner, Jonas David Hofmann, Zhenpin Lu, Peter R. Schreiner, Christian Logemann
Publikováno v:
Journal of the American Chemical Society. 139:18488-18491
We report the formation of a stable neutral diboron diradical simply by coordination of an aromatic dinitrogen compound to an ortho-phenyldiborane. This process is reversible upon addition of pyridine. The diradical species is stable above 200 °C. C
Publikováno v:
Synthesis. 49:2632-2639
Azobenzenes have attracted increasing attention in the past years due to their application as molecular switches. In this report, we present a macrocyclic bisazobenzene that exists as the stable Z-isomer. The synthetic efforts as well as the successf
Publikováno v:
European Journal of Inorganic Chemistry. 2017:752-758
The reaction of elemental rhodium and concentrated sulfuric acid (97 %) at 400 °C leads to red plate-shaped single crystals of Rh2(SO4)3 [trigonal, R3, Z = 6, a = 806.8(1) pm, c = 2204.8(4) pm, V = 1242.8(4) × 106 pm3]. The same reaction carried ou
Publikováno v:
Zeitschrift für anorganische und allgemeine Chemie. 643:256-260
The reaction of ZrCl4 with oleum (65 % SO3) in the presence of Ag2SO4 at 250 °C yielded colorless single crystals of Zr(S2O7)2 [orthorhombic, Pccn, Z = 4, a = 709.08(6) pm, b = 1442.2(2) pm, c = 942.23(9) pm, V = 963.5(2) × 106 pm3]. Zr(S2O7)2 show
Publikováno v:
Organic Chemistry Frontiers. 4:871-875
The bidentate bisborane Lewis acid catalysed inverse electron-demand Diels–Alder (IEDDA) reaction of 1,4-naphthoquinones (1,4-NQs) with 1,2,4,5-tetrazine (TZ) has been developed for the synthesis of 2,3-diaza-anthraquinones (2,3-DAAQs). Only due to
Autor:
Jan-Philipp Berndt, Peter R. Schreiner, Radim Hrdina, Dhaka Ram Bhandari, Jonathan Becker, Christian Logemann, Yevhenii Radchenko
Publikováno v:
Chemical Science
Site-selective nitrenoid insertions are made possible with a postfunctionalized dirhodium(ii)-catalyst equipped with a remote hydrogen bonding site.
We report a new strategy for the preparation of dirhodium(ii) complexes with the general formula
We report a new strategy for the preparation of dirhodium(ii) complexes with the general formula