Cycloaddition of sterically hindered 1,2-dicyclopropylethylenes with tetracyanoquinodimethane; one-step formation of [10]paracyclophadienes
Abstract
[10]Paracyclopha-4,6-dienes were produced in the reaction of sterically hindered 1,2-dicyclopropylethylenes with tetracyanoquinodimethane in a π6 +σ2 +π2 +σ2 cyloaddition.