A Convenient Synthesis of 5-Amino-Substituted 1,2,4-Oxadiazole Derivatives via Reactions of Amidoximes with Carbodiimides
作者:Konstantina C. Fylaktakidou、Maria Ispikoudi、Konstantinos E. Litinas、Konstantina C. Fylaktakidou
DOI:10.3987/com-08-11340
日期:——
one step and in high yields, via reactions of a variety of aryl, benzyl, cycloalkyl and alkyl amidoximes with commercially available carbodiimides. Alkyl carbodiimides reacted with amidoximes in toluene to give 5-alkylamino-1,2,4-oxadiazoles, whereas aromatic carbodiimide reacted in DMF to give initially the intermediate O-amidoxime adducts, which were further cyclized to the corresponding 5-arylamino-1
通过各种芳基、苄基、环烷基和烷基偕胺肟与市售碳二亚胺的反应,可以在一个步骤中以高产率轻松制备 5-氨基取代的 1,2,4-恶二唑衍生物。烷基碳二亚胺在甲苯中与偕胺肟反应得到 5-烷基氨基-1,2,4-恶二唑,而芳族碳二亚胺在 DMF 中反应最初得到中间体 O-偕胺肟加合物,进一步环化为相应的 5-芳基氨基-1, 2,4-恶二唑。