C 57 Chupakhin, O. N. S-N(H) Reactions of ch-acids and polychlorinated organic compounds in ionic liquids [Text] / O. N. Chupakhin, V. N. Charushin ; comp.: V. Lunin, P. Tundo, E. Lokteva // Green Chemistry in Russia. - 2005. - P19-28 : рис. ; Green Chemistry Series N 12. - Библиогр.: p. 19-28 (7 ref.) . - ISBN 88-88214-17-8 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: We have discussed the grounds of modern understandings about S reactions. Quite recently??N??they used to be associated with Chichibabin reaction,hydroxylation of nitrobenzene,synthesis of??alizarin,i.e. with the processes occurring under stringent conditions,what is natural in terms of the??- high-energy nature of the displaced H particle. This situation did not stimulate chemists to investi-??gate this area. This pattern entirely changed today. Modern data on the reaction mechanism give a??clear idea of a necessity to fulfil an indirect removal of the hydride ion. This knowledge has undeni-??ably contributed much to the progress in this field of research through development of diverse and??H??convenient synthetic methods with the use of S??reactions.??N |
C 76 Convenient synthesis of building-blocks for pyridine/piperidine-decorated crown ethers [Electronic resource] / M. B. Nawrozkij, E. B. Gorbunov, V. L. Rusinov, V. N. Charushin // Macroheterocycles . - 2014. - Vol.7, №1. - С. 18-22. - Bibliogr. : p. 22 (19 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): 2-VYNYLPYRIDINE -- EPOXIDATION -- HYDROXYLATION Аннотация: A convenient way to 1-(pyridin-2-yl)ethan-1,2-diol, 2-(oxiran-2-yl)pyridine and two diastereomeric forms of 1-(piperidin- 2-yl)ethan-1,2-diol, valuable building-blocks for the synthesis of functionalized crown ethers, has been developed. It is based on the Wagner oxidation or NBS-mediated epoxydation of 2-vinylpyridine, and the Schwenk-Papa reduction of 1-(pyridin-2-yl)ethan-1,2-diol, accompanied by fractional crystallization of a diastereo-meric mixture of the target product |