One-pot synthesis of 6H-pyrrolo[2,3-e[1,2,4]triazolo[1,5-a]pyrimidines on the basis of σH-adducts of 6-Nitro[1,2,4]triazolo[1,5-a]pyrimidine with carbonyl compounds
作者:E. B. Gorbunov、G. L. Rusinov、R. I. Ishmetova、V. N. Charushin、O. N. Chupakhin
DOI:10.1134/s107042800801017x
日期:2008.1
Aromatic, heteroaromatic, and aliphatic carbonyl compounds reacted with 6-nitro[1,2,4]triazolo[1,5-a]pyrimidine in the presence of a base to give stable σH-adducts at C7. Reduction of the nitro group in the latter is accompanied by tandem autoaromatization of the azine ring and intramolecular cyclocondensation with formation of the corresponding 6H-pyrrolo[2,3-e][1,2,4]triazolo[1,5-a]pyrimidines.
芳香族、杂芳香族和脂肪族羰基化合物与 6-硝基[1,2,4]三唑并[1,5-a]嘧啶在碱存在下发生反应,在 C7 处生成稳定的 σH 加合物。后者中硝基的还原伴随着偶氮环的串联自芳香化和分子内环缩合,形成相应的 6H-吡咯并[2,3-e][1,2,4]三唑并[1,5-a]嘧啶。