The polyfunctionalized title triazolyl 1,3-diketones have been prepared by the addition-cyclization reaction of sodium azide to 1,5-diaryl-4-pentyne-1,3-diones, in the first instance, in good yields. These intermediate triazoles can readily be cyclodehydrated to the corresponding 3,6-diaryl-4H-pyrrolo[1,2-c][1,2,3]triazol-4-one derivatives. This cyclodehydration furnishes a new method of synthesis of a new class of pyrrolo[1,2-c][1,2,3]triazoles. The structures of the above compounds were confirmed from their spectral characteristics.
通过
叠氮化
钠与 1,5-二芳基-4-戊炔-1,3-二酮的加成-环化反应,首先制备出了多官能化的 1,3-二酮三唑。这些三唑中间体很容易通过环脱
水反应生成相应的 3,6-二芳基-4H-
吡咯并[1,2-c][1,2,3]三唑-4-酮衍
生物。这种环化反应为合成一类新的
吡咯并[1,2-c][1,2,3]三唑提供了一种新方法。上述化合物的结构已从其光谱特征中得到证实。