(3+3)-Annulation of Donor-Acceptor Cyclopropanes with Diaziridines

Angew Chem Int Ed Engl. 2018 Aug 6;57(32):10338-10342. doi: 10.1002/anie.201805258. Epub 2018 Jul 17.

Abstract

The first example of (3+3)-annulation of two different three-membered rings is reported herein. Donor-acceptor cyclopropanes in reaction with diaziridines were found to afford perhydropyridazine derivatives in high yields and diastereoselectivity under mild Lewis acid catalysis. The disclosed reaction is applicable for the broad substrate scope and exhibits an excellent functional group tolerance.

Keywords: annulation; diaziridines; donor-acceptor cyclopropanes; nitrogen heterocycles; small ring systems.