Base-mediated homologative rearrangement of nitrogen–oxygen bonds of N-methyl-N-oxyamides

Due to the well known reactivity of C(O)–N functionalities towards canonical C1-homologating agents ( e.g. carbenoids, diazomethane, ylides), resulting in the extrusion of the N -centered fragment en route to carbonyl compounds, formal C1-insertions within N–O bonds still remain obscure.