Diazo compounds (i.e., (R 1 )(R 2 )CN 2 where R 1 and R 2 indicate functional groups) are well-known carbene (i.e., (R 1 )(R 2 )C:) precursors that have garnered significant attention in organic synthesis because of their unique electronic and structural properties . The generated carbenes from diazo are highly reactive intermediates that participate in a variety of chemical processes, including XH insertion (where X = C, O, N, S) , cyclopropanation , and tandem cross-coupling .