Synthesis of Secondary Boronates via Deaminative Cross‐Coupling of Alkyl Nitroso Carbamates and Boronic Acids

A strategy for transition metal‐free cross‐coupling of alkyl nitroso‐carbamates and boronic acids is reported. The N ‐nitroso carbamates are easily prepared from the corresponding amine in two simple steps. This method allows for the synthesis of a wide variety of secondary boronates, benzylic boronates and formal Csp 3 −Csp 2 cross‐coupling products under operationally simple conditions. Functional group tolerance is also demonstrated and applied in the modification of lysine to make non‐canonical amino acids.