A Novel One-Pot, Three-Component
Synthesis of Dialkyl 5-(Alkylamino)-1-aryl-1<i>H</i>-pyrazole-3,4-dicarboxylates
作者:Mehdi Adib、Bagher Mohammadi、Hamid Bijanzadeh
DOI:10.1055/s-0028-1087365
日期:——
A novel, one-pot, and three-component synthesis of dialkyl 5-(alkylamino)-1-aryl-1H-pyrazole-3,4-dicarboxylates is described. The reactive 1:1 zwitterionic intermediate, formed by the addition of isocyanides to dialkyl acetylenedicarboxylates, was trapped by hydrazinecarboxamides to afford the title compounds in good yields.