A combined theoretical and experimental study of a Povarov‐type cycloaddition reaction suggests an asynchronous concerted process that is favored by double Lewis acid activation with BF3·Et2O; endo selectivity was observed in the reactions between N‐(3‐pyridyl)aldimines and styrene, cyclopentadiene, or indene, and substituted tetrahydro‐1,5‐naphthyridine derivatives were obtained in a regio‐ and stereoselective fashion.
An enantioselective synthesis of tetrasubstituted a-phosphono-a-amino nitriles through asymmetric cyanation of a-ketiminophosphonates catalyzed by Cinchona alkaloids is reported. a-Ket-
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.