Affiliation: | 1. Organisch‐Chemisches Institut, Westf?lische Wilhelms‐Universit?t, Corrensstrasse 40, 48149 Münster (Germany), Fax: (+49)?281‐83‐36523;2. Department of Chemistry, Graduate School of Science, Nagoya University, Chikusa, Nagoya 464‐8602 (Japan), Fax: (+81)?52‐788‐6098 http://synth.chem.nagoya‐u.ac.jp |