Reactions of 3<i>H</i>-furan-2-ones and 2<i>H</i>-chromen-2-ones with pyrazole-3(5)-diazonium salts
作者:Inna D. Mokhonova、Evgenij A. Maksimov、Irina V. Ledenyona、Alevtina Y. Yegorova、Khidmet S. Shikhaliev
DOI:10.1515/hc-2017-0192
日期:2018.8.28
of the new heterocyclic system, 6H-chromeno[4,3-e]pyrazolo[5,1-c][1,2,4]triazin-6-one, were obtained by the reaction of pyrazole-3(5)-diazonium salts with 4-hydroxy-2H-chromen-2-one. Similar reactions with 5-phenyl-3H-furan-2-one followed by intramolecular heterocyclization furnished 6-(4-halophenyl)-7-alkyl-2-phenylfuro[2,3-e]pyrazolo[5,1-c][1,2,4]triazines.