123858-72-0Relevant academic research and scientific papers
Five-membered 2,3-dioxo heterocycles: XLVII. Reaction of 5-aryl-4-phenyl-2,3-dihydrofuran-2,3-diones with compounds containing C = N and C≡N bonds
Vostrov,Leont'eva,Tarasova,Maslivets
, p. 1058 - 1061 (2004)
Thermal decarbonylation of 5-aryl-4-phenyl-2,3-dihydrofuran-2,3-diones gives rise to intermediate aroyl(phenyl)ketenes which react with nonactivated Schiff bases, N,N'-dicyclohexylcarbodiimide, and p-di-methylaminobenzonitrile according to the [4 + 2]-cycloaddition pattern with formation of 6-aryl-5-phenyl-4H-1,3-oxazin-4-ones. Reactions of 5-aryl-4-phenyl-2,3- dihydrofuran-2,3-diones with activated Schiff bases at a temperature below the thermolysis temperature lead to 4-aroyl-4-phenyltetrahydropyrrole-2,3-diones.
New Syntheses of 1,3-Oxazines, Thiazoles, and 1,2-Dithioles
Capuano, Lilly,Bolz, Gerda,Burger, Robert,Burkhardt, Volker,Huch, Volker
, p. 239 - 243 (2007/10/02)
The 2-diazo-1,3-diketones 1 react with thioamides 4 via the acyl ketenes 3, resulting from Wolff rearrangement, to give the 1,3-oxazine-4-ones 10; however, by increasing the electrophilicity of the diazo compounds or the nucleophilicity of the thioamides,
