Regioselective alkylation of 1H-7-ethoxycarbonyl-6-methyl-3-phenyl-pyrazolo[5,1-c][1,2,4]triazole and 1H-6-methyl-3-phenyl-pyrazolo[5,1-c][1,2,4]triazole
作者:Valentin Badea、Maria D. Şofei、Monica M. Venter、Vasile N. Bercean
DOI:10.1016/j.tet.2006.11.067
日期:2007.2
Alkylation of 1H-6-methyl-3-phenyl-pyrazolo[5,1-c][1,2,4]triazole and 1H-7-ethoxycarbonyl-6-methyl-3-phenyl-pyrazolo[5,1-c][1,2,4]triazole using different alkylating agents leads regioselectively to 1-N-alkylated products. The hydrolysis–decarboxylation of 1,6-dimethyl-7-ethoxycarbonyl-pyrazolo[5,1-c][1,2,4]triazole yields a compound identical with that obtained by the direct methylation of 1H-6-m
1 H -6-甲基-3-苯基-吡唑并[5,1- c ] [1,2,4]三唑与1 H -7-乙氧基羰基-6-甲基-3-苯基-并吡唑[5,1 ]的烷基化- ç ] [1,2,4]使用不同的烷基化剂的引线区域选择性至1-三唑ñ烷基化产品。1,6-二甲基-7-乙氧基羰基-吡唑并[5,1- c ] [1,2,4]三唑的水解-脱羧反应生成的化合物与通过1 H -6-甲基-直接甲基化获得的化合物相同3-苯基吡唑并[5,1- c ] [1,2,4]三唑。通过NMR光谱和质谱法确认了1-N-烷基化。