Catalytic [3 + 3]-Cycloaddition for Regioselective Preparation of Tricyclic Oxadiazines

Abstract

Agrochemically useful and structurally important, functionally rich tricyclic-oxadiazines were synthesized in very good yields with excellent diastereoselectivities through a catalytic [3 + 3]-cycloaddition from the readily available p-quinols, azomethine imines, and a catalytic amount of Brønsted base (KOtBu).