Rearrangements of 2-imino-2H-1-benzopyran-3-carboxamides under action of anthranilic acid as N-nucleophile

New rearrangements of 2-imino-2H-1-benzopyran-3-carboxamides ((1) under bar ) under action of anthranilic acid ((2) under bar) as N-nucleophile have be en revealed. Starting from readily available 2-imino-2H-1-benzopyran-3-carb oxamides ((1) under bar) and anthranilic acid ((2) under bar) and depending on reaction conditio ns, 2-(2-oxo-2H-1-benzopyran-2-yl)-3H-quinazolin-4-on es <(3a,b)under bar> and 2-oxo-2H-1-benzopyran-3-(N-2-carboxyphenyl)carboxa mides <(4a,b)under bar> have been prepared via the rearrangements. Possible mechanisms of these rearrangements have been discussed.