1. Institut für Organische Chemie der Justus-Liebig-Universität, Heinrich-Buff-Ring 58, D-35392 Giessen, Germany; Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556; Department of Organic Chemistry, Kiev Polytechnic Institute, pr. Pobedy, 37, 03056 Kiev, Ukraine; Institut für Organische Chemie, Georg-August-Universität, Tammannstr. 2, D-37077 Göttingen, Germany; Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-9603,...