A modified Biginelli reaction toward oxygen-bridged tetrahydropyrimidines fused with substituted 1,2,4-triazole ring
作者:Mustafa K. Gümüş、Nikolay Yu. Gorobets、Yuriy V. Sedash、Valentin A. Chebanov、Sergey M. Desenko
DOI:10.1007/s10593-018-2204-3
日期:2017.11
A microwave-assisted Biginelli-like three-component condensation using salicylic aldehyde derivatives, acetone, and 5-substituted 3-amino-1,2,4-triazoles instead of the urea component results in the formation of oxygen-bridged tetrahydrotriazolopyrimidine derivatives (11,12-dihydro-5,11-methano[1,2,4]triazolo[1,5-c][1,3,5]benzoxadiazocines) in good yields and high purity. A plausible reaction mechanism
使用水杨醛衍生物,丙酮和5-取代的3-氨基-1,2,4-三唑代替尿素组分进行微波辅助的Biginelli样三组分缩合反应会形成氧桥联的四氢三唑并嘧啶衍生物(11 ,12-二氢-5,11-甲醇[1,2,4]三唑并[1,5- c ] [1,3,5]苯并恶二唑胺)的收率高且纯度高。使用文献和实验数据详细讨论了这种转化的合理反应机理。