- The Kost-Sagitullin rearrangement in a series of 1-alkyl-2- (carbamoylmethyl)-4,6-dimethylpyrimidinium iodides
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The rearrangement of 1-alkyl-2-(carbamoylmethyl)pyrimidinium iodides into substituted 2-alkylaminonicotinamides occurring in alcoholic solutions of amines has been studied. It was shown that in the presence of water the rearrangement of 2-(carbamoylmethyl)-1,4,6-trimethylpyrimidinium iodide is accompanied by the formation of a derivative of 2-oxo-1,2-dihydronicotinic acid, and under the action of ethylamine a rearrangement and transamination occurs leading to 2-ethylamino-4,6-dimethylnicotinamide.
- Danagulyan,Sahakyan
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- Synthesis and Photophysical Properties of 3-Amino-4-arylpyridin-2(1 H)-ones
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A method has been developed for the preparation of oxazolo-[5,4- b ]pyridin-2(1 H)-ones based on the Hoffmann reaction of 2-oxo-1,2-dihydropyridine-3-carboxamides. Hydrolysis of oxazolo[5,4- b ]pyridin-2(1 H)-ones and the Hoffmann reaction of 2-oxo-1,2-dihydropyridine-3-carboxamides yielded 3-aminopyridin-2(1 H)-ones, including 4-aryl substituted derivatives in the series, for which effective phosphors with a quantum yield of up to 0.78 were detected. Photophysical properties of 3-aminopyridin-2(1 H)-ones were studied by UV and luminescence spectroscopy methods, and the relationship between their structure and photophysical properties was revealed.
- Abramov, Anton A.,Chernenko, Sergey A.,Fisyuk, Alexander S.,Kostyuchenko, Anastasia S.,Shatsauskas, Anton L.
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p. 227 - 238
(2019/12/28)
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