Cycloaddition Reaction of 1,2,4-Triazolium Phenacylides with Cinnamic Esters

Abstract

1,2,4-Trismlium phenacylides generated i n sit" from the corresponding 1,2,4-triazoliumsalts reacted with cinnamlc esters to afford tetrahydropyrroiotriazoie derivatives.These [3+2] dipolar cycloaddition reactions occur stere-and reglospecific, giving only derivatives of the type ( b -d ) .The stere-and regiochemistry of these products was mainly elucidated by 'H-NMR, l 3 c -~M F I and DEPT analysis.