R 30 Reactions of quinoxaline with 3-methyl-1-phenylpyrazol-5-one / Y. A. Azev, E. D. Oparinaa, I. S. Kovalev, P. A. Slepukhin, R. K. Novikova // Mendeleev Communications. - 2012. - Vol.22, №1. - С. 37-38 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): QUINOXALINES -- PHENYLPYRAZOL -- TRIETHYLAMINE Аннотация: Quinoxaline during the reaction with 3-methyl-1-phenylpyrazol-5-one in the presence of triethylamine at room temperature in dimethylsulfoxide eliminates o-phenylenediamine and gives 4,4’-methylene-bis(3-methyl-1-phenylpyrazol-5-one) and 1,1,2,2-tetrakis(5-methyl-2-oxo-2-phenyl-1,2-dihydro-3H-pyrazol-4-yl)ethane. The latter was proved to be the intermediate to form the above dipyrazolylmethane derivative \\\\Expert2\\nbo\\Mendeleev Communications\\2012, v.22, p. 37.pdf |