3-dipolar [3 + 2] – cycloaddition

This paper describes the use of 1,4-naphthoquinones, as the sentimental equivalents of
electron-diphosphate alkenes, as activation by dipolarophyll in the reaction [3+2] cyclization.
The paper finds that the use of a silver acetate catalyst strictly spatially coordinates a molecule
of azometinilide in a transitional state, which explains the production of exclusively ciscoupling
products. In the analysis of the optimization of the reaction conditions, the following
regularity was established: during the course of the reaction according to the classical