... L. L Belen'kii,* L S. Poddubnyi, and MM Krayushkin ND Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 47 Leninsky prosp., 117913 Moscow, Russian Federation. Fax: + 7 (095) 135 5328 ... 1848 Russian Chemical Bulletin, Vol. 42, No. 11, November, 1993 ...