1. 1) S. Matsumoto: Paper read before the 5th Annual Meeting of the Chemical Society of Japan, at Tokyo, April, 1952.
2. 2) T. Nozoe, T. Mukai, and K. Takase: Sci. Repts. Tohoku Univ., First Series, 36, 40 (1952).
3. 3) J. W. Cook, R. A. Raphael, and A. I. Scott: J. Chem. Soc., 1952, 4416.
4. 4) D. S. Tarbell: Organic Reactions, 2, 2.
5. 5) The microanalyses were carried out by Mr. Aoyagi of Miike Dyestuff Co., Ltd.