L 81 Lithiacarboranes and 1,2,4-triazine 4-oxides: SNH reactions and ring transformations [Electronic resource] / O. N. Chupakhin, A. M. Prokhorov, D. N. Kozhevnikov, V. L. Rusinov, I. A. Glukhov, Z. A. Starikova, V. A. Ol'shevskaya, V. N. Kalinin, M. Yu. Antipin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2004. - Vol. 53, № 6. - P1223-1231. - Библиогр. : с. 1231 (14 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The reactions of 1-lithia-1,2- or 1,7-dicarba-closo-dodecaborane with 1,2,4-triazine 4-oxides can follow two competitive pathways: deoxygenative nucleophilic substitution of hydrogen to form 1-(1,2,4-triazin-5-yl)-1,2- or 1,7-dicarba-closo-dodecaboranes and the transformation of the 1,2,4-triazine ring into the triazoline ring giving rise to 1-(2-acetyl-1-aroyl-3-aryl-1,2,4-triazolin-5-yl)-1,2-dicarba-closo-dodecaboranes. Introduction of the electron-withdrawing triazine ring into the carborane cage substantially facilitates deboronation to give 1-(1,2,4-triazin-5-yl)-1,2-1,7-dicarba-nido-undecaboranes. \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2004, 53 (6), 1223-1231.pdf |