Treatment of 3-carbethoxy5,6-benzocoumarin (1a) with anthranilic acid gives 4-anthramiloyl-3-carbethoxy-3,4-dihydro-5,6-benzocoumarin (11a) and 3-carbethoxy-3,4-dihydro-5,6-benzocoumarin (IIIa) was synthesized also. Alkaline hydrolysis of (IIIb). On the otherhand the action of anthranilic acid on (1a) at 170oC gave (IIIc). (IIIa) and (Id). Cyclization of (Id) by acetic anhydride occurred and (IV) was obtained. Acidic or basic hydrolysis of (IV) gave the same product (Ic). While ammonolysis of (IV) gave (Ie). The behaviour of both (delta)-lactone and oxazinone rings in (IV) towards different amimes, hydrazines wre studied and aromatic hydrocarbons under Friedel-Crafts comditions.


M A.I SALEM ,M A EL-KASABY ,