Substituent Effects and Structural Features of α,α-Dicyanoolefins and Ketene Dithioacetals on Directing Polyfunctionalized 2,6-Dicyanoanilines or Pyrazolo[1,5-a]pyridines
作者:Abdolali Alizadeh、Seyed Hosseini、Amir Vahabi
DOI:10.1055/s-0034-1379041
日期:——
products, which is dictated by the structure and functionality of substrates. An efficient and facile synthesis of pyrazolo[1,5-a]pyridine and polyfunctionalized 2,6-dicyanoaniline derivatives via vinylogous Michael addition of cyclic or acyclic α,α-dicyanoolefins to electron-deficient ketene dithioacetals in the presence of hydrazine at room temperature is described. The prominent feature of this one-pot
摘要 在室温下在肼存在下,通过将乙烯基或环状的无环α,α-二氰基烯烃的乙烯基乙烯基加成到缺电子的烯酮二硫缩醛中,高效,简便地合成吡唑并[1,5- a ]吡啶和多官能化的2,6-二氰基苯胺描述。这种一锅法的显着特征是产品性质上的明显二分法,这取决于基质的结构和功能。 在室温下在肼存在下,通过将乙烯基或环状的无环α,α-二氰基烯烃的乙烯基乙烯基加成到缺电子的烯酮二硫缩醛中,高效,简便地合成吡唑并[1,5- a ]吡啶和多官能化的2,6-二氰基苯胺描述。这种一锅法的显着特征是产品性质上的明显二分法,这取决于基质的结构和功能。