An efficient two-step synthesis of novel 2-amino-substituted pyrazolo[1,5-a][1,3,5]triazines
作者:Henry Insuasty、Braulio Insuasty、Edison Castro、Jairo Quiroga、Rodrigo Abonia
DOI:10.1016/j.tetlet.2013.01.073
日期:2013.3
A series of novel 2-amino-substituted pyrazolo[1,5-a][1,3,5]triazines were selectively synthesized by a two-step reaction between 5-amino-3-hetaryl-1H-pyrazoles and hetaroyl isothiocyanates with subsequent amination and cyclization promoted by the couple HgCl2/TEA and DMF as solvent. This approach provided the title compounds in good to excellent yields and under mild reaction conditions. The structures
通过5-氨基-3-杂芳基-1H-吡唑与异戊基异硫氰酸酯的两步反应,选择性地合成了一系列新型的2-氨基取代的吡唑并[1,5- a ] [1,3,5]三嗪HgCl 2 / TEA和DMF对作为溶剂促进了随后的胺化和环化反应。该方法在温和的反应条件下以良好至极好的收率提供了标题化合物。新化合物的结构通过光谱和分析技术明确建立。