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Chemistry of a Stable Singlet Biradical
S. Hiroto, N. Aratani, N. Shibata, Y. Higuchi, T. Sasamori, N. Tokitoh, H. Shinokubo*, A. Osuka*
Nagoya University, Kyoto University, University of Hyogo and the RIKEN Spring-8 Center, Hyogo, Japan
25 May 2009 (online)
The singlet biradical biscorrole (2) was found to undergo a nucleophilic addition with pyridine under mild conditions. The products of this reaction were isolated and characterized. The pyridination was found to proceed regioselectively to yield zwitterionic species.