Abstract
The radical carboazidation of alkenes could be achieved in water using triethylborane as initiator. This efficient process is complete in one hour at room temperature in an open system. These new tin-free azidation and carboazidation conditions are environmentally friendly and enable reactions to be run with an excess of either the alkene or the radical precursor. Furthermore, 3-pyridinesulfonyl azide could be used in order to avoid tedious purifications, especially when the reaction product has a similar chromatographic behavior to benzenesulfonyl azide, our original azidation reagent.
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