First, Atropo-Enantioselective Total Synthesis of the Axially Chiral Phenylanthraquinone Natural Products Knipholone and 6'-O-Methylknipholone Novel Concepts in Directed Biaryl Synthesis, Part 93. This work was supported by the Deutsche Forschungsgemeinschaft (grant: SFB 347) and by the Fonds der Chemischen Industrie. We thank Prof. B. M. Abegaz und Dr. M. Bezabih for an authentic sample of 6'-O-methylknipholone and for valuable discussions. We thank J. Kraus for helpful suggestions and V. Barthel for technical support. Part 92: G. Bringmann, J. Hinrichs, K. Peters, E.-M. Peters, J. Org. Chem. 2001, 66, 629-632.
Bringmann
Gerhard
G
Institut für Organische Chemie Universität Würzburg Am Hubland, 97074 Würzburg (Germany).
Menche
Dirk
D