t-Butyl N,N-dibromocarbamate (BBC)—new reagent for aminobromination of terminal alkenes

t-Butyl N,N-dibromocarbamate, easily obtained by bromination of t-butyl carbamate in aqueous potassium carbonate, reacts smoothly with a variety of terminal alkenes to afford the corresponding β-bromo-N-Boc-amines upon reduction with aqueous sodium sulphite. Immediate deprotection of N-Boc-amines with gaseous HCl yields β-bromoamine hydrochlorides in good yields.