Synthesis of new pyrazolo[4,3-e]-1,2,4-triazolo[1,5-c]pyrimidines and related heterocycles
作者:Pier Giovanni Baraldi、Hussein El-Kashef、Abdel-Rahman Farghaly、Patrice Vanelle、Francesca Fruttarolo
DOI:10.1016/j.tet.2004.04.010
日期:2004.5
The reaction between 5-amino-4-imino-1(2)-substituted-1(2)H-4,5-dihydropyrazolo[3,4-d]pyrimidines and several commercially available reactants afforded new heterocycles with a conserved pyrazolo[3,4-d]pyrimidine nucleus. The key intermediates employed proved to be suitable compounds by virtue of their two vicinal amino and imino groups that were used to obtain five, six and seven-membered rings.
5-氨基-4-亚氨基-1(2)-取代的-1(2)H -4,5-二氢吡唑并[ 3,4- d ]嘧啶与几种市售反应物之间的反应提供了具有保守的吡唑并[1]的新杂环。 3,4- d ]嘧啶核。由于其两个邻位氨基和亚氨基被用于获得五元,六元和七元环,因此所证明的关键中间体是合适的化合物。