View all references we required a route to gem-bisacetamides. Although aldehydes will condense with carboxamides to furnish the corresponding aldoaminals,2–4 View all references protected ketoaminals derived from ketones are not well known. One example was a bisacetamide made by the Ritter reaction on a specific bicyclic ketone, 5,5,6-trimethylbicyclo[2.2.1]heptan-2-one,[5a ]5. Kozlov , NG , Popova , LA , Biba , VI , Potkina , TN and Korshuk , É.F. 1988. Reaction of ...