ChemInform Abstract: The Regiochemistry and Stereochemistry of 1,3‐Dipolar Cycloaddition of Cyclic Nitrones.

Abstract While the cycloaddition of alkenes such as (II) to the pyrroline N‐oxide (I) affords a mixture of all possible isomers (III) + (IV), the reaction of alkenes such as (V) with (I) is regioselective and leads to the 2‐substituted adducts, e.g. (VI).