Reactions of 1-amino-2,4,6-triphenylpyridinium cations with α,β-unsaturated compounds synthesis of highly substituted pyrazolo [1,5-a]pyridine derivatives
作者:Hector Beltrami、Jesus Mallen
DOI:10.1016/s0040-4020(01)91117-2
日期:1984.1
The cycloaddition reaction of 1-amno-2,4,6-triphenylpyridinium cations 2a-f with acrylonitrile, diethyl maleate, ethyl acrylate and methyl acrylate provides a convenient route for the synthesis of nitrogen-bridged heterocyclic pyrazolo[l,5-a]pyridines and their dihydro-derivatives.
1-氨基-2,4,6-三苯基吡啶鎓阳离子2a-f与丙烯腈,马来酸二乙酯,丙烯酸乙酯和丙烯酸甲酯的环加成反应为合成氮桥杂环吡唑并[1,5-a]提供了便利的途径。吡啶及其二氢衍生物。