Intramolecular hydrogen bonding-assisted cyclocondensation of α-diazoketones with various amines: a strategy for highly efficient Wolff 1,2,3-triazole synthesis
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