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Efficient iron-mediated approach to pyrano[3,2-a]carbazole alkaloids--first total syntheses of O-methylmurrayamine A and 7-methoxymurrayacine, first asymmetric synthesis and assignment of the…
- Konstanze K. Gruner, T. Hopfmann, Kazuhiro Matsumoto, Anne Jäger, T. Katsuki, H. Knölker
- ChemistryOrganic & biomolecular chemistry
- 16 March 2011
Iron-mediated oxidative cyclisation provides an efficient approach to pyrano[3,2-a]carbazole alkaloids. Thus, improved routes to girinimbine and murrayacine as well as the first total syntheses of…
Transition metal complexes in organic synthesis, part 53. Iron-mediated synthesis of hyellazole and isohyellazole
- H. Knölker, E. Baum, T. Hopfmann
- Chemistry
- 20 August 1999
Transition metal-diene complexes in organic synthesis, part 23. Total synthesis of the marine alkaloid hyellazole
- H. Knölker, E. Baum, T. Hopfmann
- Chemistry
- 24 July 1995
Transition metal complexes in organic synthesis. Part 65: Iron-mediated synthesis of carazostatin, a free radical scavenger from Streptomyces chromofuscus, and O-methylcarazostatin ☆
- H. Knölker, T. Hopfmann
- Chemistry
- 28 October 2002
Transition Metal-Diene Complexes in Organic Synthesis, Part 24.9b Total Synthesis of the Naturally Occurring Free Radical Scavenger Carazostatin
- H. Knölker, T. Hopfmann
- Chemistry
- 1 September 1995
A stabilizer system for stabilizing PVC
- T. Hopfmann, Hans-Helmut Friedrich, K. Kuhn, W. Wehner
- Computer Science
- 20 December 2003
(51) Int. Cl. CSK 5/34 (2006.01) (52) U.S. Cl. ........................................ ... 524/100 (58) Field of Classification Search ................. 524/100 See application file for complete…
Transition Metal Complexes in Organic Synthesis. Part 53. Iron‐Mediated Synthesis of Hyellazole (IV) and Isohyellazole (VII).
- H. Knoelker, E. Baum, T. Hopfmann
- Chemistry
- 14 December 1999
Transition Metal‐Diene Complexes in Organic Synthesis. Part 23. Total Synthesis of the Marine Alkaloid Hyellazole.
- H. Knoelker, E. Baum, T. Hopfmann
- Chemistry
- 31 October 1995
Stabilizer system for the stabilization of polymers containing halogen.
- Hans-Helmut Friedrich, T. Hopfmann, K. Kuhn, W. Wehner
- Chemistry
- 5 December 2001
The invention relates to stabilizer mixtures which are suited for stabilizing polymers that contain halogen, particularly PVC, whereby said mixtures contain: a) a perchlorate salt, and; b) an…
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