DMF as a Source of Oxygen and Aminomethine: Stereoselective 1,2-Insertion of Rhodium(II) Azavinyl Carbenes into the CO Bond of Formamides for the Synthesis of <i>cis</i>-Diamino Enones

A new catalytic reaction in which all the atoms of a formamide are incorporated into the product through a formal stereoselective 1,2-insertion of rhodium­(II) azavinyl carbenes, generated in situ from readily available N-sulfonylated 1,2,3-triazoles, into the CO bond of DMF and other N,N-disubstituted formamides to afford cis-diamino enones is described.