Synthesis of 1,4,5-trisubstituted-1,2,3-triazoles via coupling reaction of diaminomaleonitrile with aromatic diazonium salts
作者:Amal Al-Azmi、Anita K. Kalarikkal
DOI:10.1016/j.tet.2013.11.003
日期:2013.12
3-triazol-4-yl)-2-iminoacetonitriles and 2-(5-amino-1-aryl-1H-1,2,3-triazol-4-yl)-2-oxoacetonitriles was achieved by the reaction of diaminomaleonitrile and phenyl/substituted phenyl diazonium chlorides. 4-Nitrophenyl diazonium chloride afforded 2-amino-3-(3-(4-nitrophenyl)triaz-1-en-1-yl)maleonitrile. Triazole iminoacetonitrile and maleonitrile derivatives were reacted further with excess acetone and benzaldehyde
制备2-(5-氨基-1-芳基-1 H -1,2,3-三唑-4-基)-2-亚氨基乙腈和2-(5-氨基-1-芳基-1)的温和方法通过二氨基马来腈与苯基/取代的苯基重氮氯化物的反应获得H -1,2,3-三唑-4-基)-2-氧代乙腈。4-硝基苯基重氮氯化物得到2-氨基-3-(3-(4-(硝基苯基)三唑-1-en-1-基)马来腈。三唑iminoacetonitrile和马来腈衍生物与过量的丙酮和苯甲醛进一步反应用1,8-二氮杂双环[5.4.0]十一碳-7-烯的催化量以得到5 -(5-亚氨基甲基-2,2-二甲基-2, 5-二氢恶唑-4-基)-3-芳基-3 H -1,2,3-三唑-4-胺和(E)-N-亚苄基-5-(5-亚氨基-2-芳基-2,5-二氢恶唑-4-基)-3-芳基-3 H -1,2,3-三唑-4-胺。当三唑氧乙腈和马来腈衍生物与乙酸羟胺在乙酸钠存在下反应时,观察到两个竞争反应,即亲核取代和亲核加成。