1. A. Niki, T. Masuda, and T. Higashimura, J. Polym. Sci., Part A: Polym. Chem., 25, 1533 (1987).
2. K. Tsuchihara, T. Masuda, and T. Higashimura, Macromolecules, 25, 5816 (1992).
3. H. J. Lucus and E. R. Kennedy, Org. Syn., Coll. Vol. 1, 2nd ed., p. 144 (1961).
4. K. sonogashira, Y. Sohda, and N. Hagihara, Tetrahedron Lett., 93, 253 (1975).
5. D. D. Perrin, W. L. F. Armarego, and D. R. Perrin, Purification of Laboratory Chemicals, 2nd ed., Pergamon Press, Oxford, 1980.