Results Lithium aluminum hydride reduction of N, N-di-methyl-5-oxo-2- pyrrolidinecarboxamide gave 1, which has also been prepared by reduction of the N, N- dimethylamide of pr~ line.~ Its thermodynamic pK, values in water at 35" C were found to be 9.82 and 5.77. Equilibrium constants for iminium ion formation from acetone and secondary amines in aqueous solution are so small that it is not practical to follow the reactions ...
