Ethyl 3,3-diamino-2-(2-p-tolylpyrimidin-4-yl)acrylate, a new representative of hetarylketene aminals
摘要:
A new representative of hetarylketene aminals, ethyl 3,3-diamino-2-(2-p-tolylpyrimidin-4-yl)acrylate, was synthesized by the reaction of p-toluamidine with the condensation product of dimethylformamide dimethyl acetal and the difluoroboron chelate of acetyl(ethoxycarbonyl)ketene (N-benzoyl)aminal. This synthesis is an example of pyrimidine ring assembly using the methodology based on transformations of chelate complexes.
Sur le comportement des alcoxydifluorobore B(OR)F2 en presence d'amines
作者:J.P. Tuchagues、J.P. Laurent
DOI:10.1016/0022-1902(74)80608-1
日期:1974.7
between an amine (A) and an alcoxydifluoroboron (B(OR)F2). At low temperature, we characterized the additive compound A → B(OF)F2 which remains stable up to −30°C. By increasing the temperature of this reaction mixture, or through the reaction, at room temperature, between the amine and the alcoxydifluoroboron, we obtained the corresponding borate B(OR)3, and the additive compound A → BF3.
3-[Amino(methylthio)methylene]pentane-2,4-dione in the synthesis of functionalized pyridines
作者:V. A. Dorokhov、M. A. Prezent、V. S. Bogdanov
DOI:10.1007/bf00707056
日期:1995.6
New syntheses of functionalized pyridines from 3-[amino(methylthio)methylene]-2,4-pentanedionevia its boron chelates were proposed. The products of condensation of dimethylformamide dimethylacetal with the latter chelates were converted into 3-acetyl-2-methylthio-4-hydroxypyridine by refluxing in BuOH and into 1-alkyl-3-cyano-2-methyl-4-pyridones by treatment with primary amines.