1. 1) Present address: Graduate School of Pharmaceutical Sciences, Kyoto University; Sakyo-ku, Kyoto 606–8501, Japan.
2. 2) Patai S. (ed.), “The Chemistry of Ketenes, Allenes, and Related Compounds,” John Wiley & Sons, Chichester, 1980.
3. 3) Brandsma L., Verkruijsse H. D., “Synthesis of Acetylenes, Allenes, and Cumulenes,” Elsevier, Amsterdam, 1981.
4. 4) Landor S. R. (ed.), “The Chemistry of the Allenes,” Academic Press, London, 1982.
5. 5) Schuster H., Coppola G., “Allenes in Organic Synthesis,” John Wiley & Sons, New York, 1984.