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.