This work demonstrates that BrF3 is very efficient in converting various carbonyls through their azines, oxime methyl ethers, or various hydrazones into the corresponding CF2 moiety.
A concise and efficient route for the diastereoselective synthesis of new and interesting α-hydrazino tetrazoles has been developed through a pseudo five-component domino reaction using the isocyanide-based one-pot multicomponent reaction. The products were obtained by a facile Ugi-azide pseudo five-component reaction of cyclic ketones, hydrazinehydrate, trimethylsilyl azide, and corresponding isocyanides