R 30 Reactions of pyrazinium salts with phenols:from σH-adducts to SN Hproducts and transformations into benzo[b]furans / E. V. Verbitskiy, Yu. A. Kvashnin, P. A. Slepukhin, A. V. Kuchin, G. L. Rusinov, O. N. Chupakhin, V. N. Charushina // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2011. - Vol.60, №5. - С. 919-928 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): DIHYDROPYRIDINES -- NUCLEOPHILIC SUBSTITUTION -- HYDROGEN Аннотация: The reaction of 5-(het)aryl-2,3-dicyano-1-ethylpyrazinium salts with phenol derivatives affords relatively stable dihydropyrazines, whereas the reactions of 6-(het)aryl-1,2,5-oxadiazolo[3,4-b]pyrazin-4-ium protic salts, depending on the phenol structure, result in products of nucleophilic substitution of hydrogen or open-chain transformation products: benzo[b]furan-substituted derivatives. The crystallographic data on the spatial structure of all types of the synthesized products were obtained \\\\Expert2\\nbo\\Russian Chemical Bulletin\\2011, 60 (5), 919-928.pdf |