Synthesis of 3-Aminopyridin-2(1H)-Ones and 1H-Pyrido[2,3-b][1,4]Oxazin-2(3H)-Ones
摘要:
The interaction of 1,3-diketones with chloroacetamide produced N-(3-oxoalkenyl)chloroacetamides. Heating of N-(3-oxoalkenyl)chloroacetamides with an excess of pyridine in ethanol or butanol led to the formation of pyridin-2(1De)-ones, substituted with a pyridine ring at position 3. The reactions of these compounds with hydrazine hydrate produced 3-aminopyridin-2(1De)-ones. The synthesis of 1H-pyrido[2,3-b][1, 4]oxazin-2(3H)-ones was accomplished by a reaction of 3-aminopyridin-2(1De)-ones with chloroacetyl chloride.
Synthesis of pyridin-2(1H)-ones by the intramolecular cyclization of amides of β-enamino ketones
作者:D. S. Goncharov、A. S. Kostuchenko、A. S. Fisyuk
DOI:10.1007/s10593-009-0358-8
日期:2009.7
It has been shown that intramolecularcyclization of N-(1-methyl-3-oxobut-1-en-1-yl)phenyl- and -tosylacetamides in basic media lead to 3-phenyl- and 3-tosyl-substituted 4,6-dimethylpyridin-2(1H)-ones.
Reaction of N-(3-oxoalkenyl)chloroacetamides with sodium p-toluenesulfinate – synthesis of 3-tosylpyridin-2(1Н)-ones
作者:Dmitry S. Goncharov、Ivan V. Kulakov、Alexander S. Fisyuk
DOI:10.1007/s10593-018-2215-0
日期:2017.12
A series of N-(3-oxoalkenyl)chloroacetamides was prepared by acylation of β-enaminoketones with chloroacetyl chloride. A reaction of these compounds with sodium p-toluenesulfinate in dimethylformamide in the presence of potassium carbonate led to 3-tosylpyridin-2(1H)-ones. The limitations of this reaction were studied.
Synthesis of 3-S-hetaryl-substituted pyridin-2(1H)-ones and 5,6-dihydropyridin-2(1H)-ones*
作者:A. S. Fisyuk、Y. P. Bogza、N. V. Poendaev、D. S. Goncharov
DOI:10.1007/s10593-010-0592-0
日期:2010.11
A method has been developed for the synthesis of 3-S-hetaryl-substituted pyridin-2(1H)-ones and 5,6-dihydropyridin-2(1H)-ones based on the base catalyzed cyclization of N-(3-oxoalkyl)- and N-(3-oxoalkenyl)amides which contain a divalent sulfur atom in an α-position to a carbamoyl group and bound to the heterocycle.