2-(N-Alkylamino)-1-(trifluoroacetimidoyl)vinyl ketone derivatives as potential reagents in heterocyclic synthesis
作者:L. S. Vasil’ev、M. A. Prezent、A. V. Ignatenko、V. A. Dorokhov
DOI:10.1007/s11172-008-0336-9
日期:2008.11
A reaction of 3-acetyl-4-amino-5,5,5-trifluoropent-3-en-2-one diphenylboron chelate and ammonia or primary amines affords 4-amino- or 4-alkylamino-3-trifluoroacetimidoylpent-3-en-2-ones, new reagents which can be used for the synthesis of pyrimidines with trifluoromethyl group.
Synthesis of 4-(trifluoromethyl)pyrido[4,3-d]pyrimidine derivatives
作者:L. S. Vasil’ev、S. V. Baranin、A. V. Ignatenko、Yu. V. Nelyubina、V. A. Dorokhov
DOI:10.1007/s11172-010-0254-5
日期:2010.7
Earlier unknown 4-alkoxy-and 4-hydroxy-5-methyl-4-trifluoromethyl-1,4-dihydropyri-do[4,3-d]pyrimidines were obtained by the reaction of 5-acetyl-4-dimethylaminovinyl-6-(trifluoromethyl)pyrimidine with alcoholic (aqueous) solutions of NH3. The former eliminate alcohol (water) on sublimation in vacuo to be converted to 5-methyl-4-(trifluoromethyl)-pyrido[4,3-d]pyrimidine. The latter upon the action of alcohols (water) under mild conditions were reverted to the corresponding 4-alkoxy-and 4-hydroxydihydropyrido[4,3-d]pyrimidines.