Abstract The reaction of carboxamides and dialkoxymethanes can be affected by sulfonic acids (methanesulfonic acid, p-toluenesulfonic acid, and Nafion-H SAC-13 silica nanocomposite) to yield N-alkoxymethylcarboxamides. Various types of N-alkyl-and N-aryl- substituted acetamides can be reacted in a one-step procedure to give the products in moderate to good yields.
![Butane,1,1'-[methylenebis(oxy)]bis- Structure](https://image.chemsrc.com/caspic/389/2568-90-3.png)
