One-pot synthesis of novel pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidines under microwave irradiation in a green solvent
作者:Jia Hui Ng、Anton V. Dolzhenko
DOI:10.1016/j.tet.2023.133521
日期:2023.7
A one-pot microwave-assisted method for the synthesis of pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidines from 5-aminopyrazolyl-4-carbonitriles, orthoesters, and hydrazides was developed. The method utilizes anisole as a geen media for the reaction and tolerates variations in the structure of each substrate, thus allowing the preparation of diverse pyrazolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidines.
一种由 5-氨基吡唑基-4-甲腈、原酸酯和酰肼合成吡唑并[4,3-e][1,2,4]三唑并[1,5-c]嘧啶的一锅法发达。该方法利用苯甲醚作为反应的绿色介质,并能耐受每种底物结构的变化,从而可以制备多种吡唑并[4,3-e][1,2,4]三唑并[1,5-c]嘧啶类。无催化剂的一锅法、反应时间短和后处理方便是该方法的其他有益特征。