Collect. Czech. Chem. Commun.
1992, 57, 1314-1325
https://doi.org/10.1135/cccc19921314
3-Alkyl-6-methyl-5,7-dioxo-4,5,6,7-tetrahydro-1,2,3-triazolo[4,5-d]pyrimidines and Their Alkylations
Alena Bozóová, Alfonz Rybár, Juraj Alföldi and Gabriela Bašnáková
Institute of Chemistry, Slovak Academy of Sciences, 842 38 Bratislava
Abstract
Alkylation of 3-alkyl-6-methyl-5,7-dioxo-4,5,6,7-tetrahydro-1,2,3-triazolo[4,5-d]pyrimidines I with alkyl halides in dimethylformamide in the presence of potassium carbonate, or by analogous alkylation of sodium salts of compounds I afforded the respective 4-alkyl derivatives III but not 5-alkyloxy-3-alkyl-6-methyl-7-oxo-6,7-dihydro-1,2,3-triazolo[4,5-d]pyrimidines IV or isomeric 1,3-dialkyl-6-methyl-5,7-dioxo-4,5,6,7-tetrahydro-1,2,3-triazolo[4,5-d]pyrimidinium halides II.
