Synthesis of phenoxypyridines under phase transfer catalysis conditions |
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Authors: | é M Abele Yu Sh Gol'dberg M P Gavars A P Gaukhman M V Shimanskaya |
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Institution: | (1) Institute of Organic Synthesis, Academy of Sciences of the Latvian SSR, Riga |
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Abstract: | Reactions of halopyridines with alkali metal phenoxides in a two phase liquid-solid catalytic system, rather than in a liquid-liquid phase transfer catalytic system, make it possible to prepare 2-, 3-, and 4-phenoxypyridines from unactivated bromo- or chloropyridines and 2-chloropicolines. In polyhalogenated pyridines only - and -halogen atoms undergo substitution. 7, 8-Dibromo-6-azaphenoxane has been prepared by the reaction of 2,3,5,6-tetrabromopyridine with the dipotassium salt of pyrocatechol.Translated from Khimiya Geterotsiklicheskikh Soedinenii, Vol. 24, No. 3, pp. 356–360, March, 1988. |
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