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.
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.