Reaction of 2-Benzoyl-1,2-dihydroisoquinaldonitrile Hydrofluoroborate Salt with Some 1,4-Quinones.

Abstract In all reactions studied up to the present time with olefins, the Reissert hydrofluoroborate salts have given only the Diels-Alder adducts. With 1,4-benzo- and naphtoquinones, we have found evidence for 1,3-dipolar cycloaddition. The structure of cycloadducts was determined from spectroscopic data and specified by a radiocristallographic study.