Potassium carbonate mediated unusual transformation of 2,3-dihydroquinazolinone via cascade reaction

An unusual potassium carbonate mediated transformation of 2,3-dihydroquinazolinone by a one-pot operation is reported under mild conditions. In addition, it is interesting to report the regioselective transformation of 3-(2-bromophenyl)-2-isopropyl-2,3-dihydroquinazolin-4(1H)-one from compound 16.

A new methodology of unusual transformation of 2,3-dihydroquinazolinone using potassium carbonate by ANRORC-type rearrangement is described.