Persulfate promoted carbamoylation of N-arylacrylamides and N-arylcinnamamides with 4-carbamoyl-Hantzsch esters

Various 3,3-disubstituted oxindoles and 3,4-disubstituted dihydroquinolin-2(1 H )-ones were synthesized via persulfate promoted intermolecular radical addition/cyclization of 4-carbamoyl-Hantzsch esters with N -arylacrylamides and N -arylcinnamamides.