[3-Dialkylamino-substituted 2H-1,4-benzoxazines].

N,N,N',N'-Tetrasubstituted 2-(2-aminophenoxy)malonamides (IX) in the presence of phosphorus oxychloride led to the formation of N,N-dialkyl-3-(dialkylamino)-2H-1,4-benzoxazine-2-carboxamides (XII). In the same way 2-(2-amino-3-pyridyloxy)-N,N,N',N'-tetraethylmalonamide (X) yielded 3-(diethylamino)-N,N-diethyl-2H-pyrido[3,2-b] [1,4]oxazine-2-carboxamide (XIII). Also N,N-dialkyl-2-(2-aminophenoxy)acetamides (XIV) by the action of phosphorus oxychloride afforded 3-(dialkylamino)-2H-1,4-benzoxazines (XV). Some compounds when submitted to pharmacological screening showed a weak depressant activity in the Irwin test.