Enaminonitriles in Heterocyclic Synthesis: A Route to 1,3-Diaryl-4-aminopyrazole Derivatives
作者:Hanadi Medrasi、Mariam Al-Sheikh、Abdellatif Salaheldin
DOI:10.3390/molecules18010535
日期:——
Benzylcyanide and 4-nitrobenzylcyanide condensed with triethyl orthoformate and piperidine or morpholine to yield 2-aryl-2-piperidinyl or 2-morpholinylacrylonitriles. These coupled with aromatic diazonium salts to yield the 2-arylhydrazno-2-arylethane nitriles in good yields. The latter were converted into 4-aminopyrazoles in good yields using the Thorpe-Ziegler cyclization.
苄腈和4-硝基苄腈与三乙基正丁酸酯和哌啶或吗啉缩合,得到2-芳基-2-哌啶基或2-吗啉基丙烯腈。这些与芳香族二氮盐偶联,良好产率地生成2-芳基肼-2-芳基乙腈。后者使用Thorpe-Ziegler环化反应在良好产率下转化为4-氨基吡唑。