... Heterocycles, 26, 2949 (1987); d) For a recent review, see T. Fujii, M. Ohba, and S. Yoshifuji, ibid., 27, 1009 (1988). ... 5) A preliminary account of this work has been published: T. Fujii, S. Yosifuji, and H. Ito, Heterocyc/es, 7, 149 (1977). ...