Some new routes for the preparation of 3-amino-2-phenyl-4(1H)-quinolinones from anthranilamides
Several new routes for the preparation of 3-amino-2-phenyl-4-1(H)- quinolinone 7a are compared. The most efficient is based on the cyclization of phenacyl anthranilamide 2a in the presence of (poly)phosphoric acid. The mechanisms of the rearrangements inv
