Organocatalytic 1,3-Dipolar Cycloaddition Reaction of β-Keto Amides with Azides - Direct Access to 1,4,5-Trisubstituted 1,2,3-Triazole-4-carboxamides
作者:Xiao Zhou、Xianhong Xu、Kun Liu、Hua Gao、Wei Wang、Wenjun Li
DOI:10.1002/ejoc.201600157
日期:2016.4
Organocatalytic [3+2] 1,3-dipolar cycloaddition reactions of β-keto amides with azides catalyzed by 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) have been developed. This strategy generates 1,4,5-trisubstituted 1,2,3-triazole-4-carboxamides in high yields and regioselectivities at room temperature. The reaction conditions have been optimized, and the scope of the β-keto amide and azide have been investigated
已开发出由 1,8-二氮杂双环 [5.4.0] 十一碳-7-烯 (DBU) 催化的 β-酮酰胺与叠氮化物的有机催化 [3+2] 1,3-偶极环加成反应。该策略在室温下以高产率和区域选择性生成 1,4,5-三取代的 1,2,3-三唑-4-甲酰胺。对反应条件进行了优化,并对β-酮酰胺和叠氮化物的适用范围进行了研究。还提出了反应机理。