Biologically active 1-arylpiperazines, synthesis of N-[3-(4-aryl-1-piperazinyl)propyl] derivatives of benzoxazinone and benzoxazolinone

The synthesis of new N-[3-(4-aryl-1-piperazinyl)propyl] derivatives of 1H-2,4-benzoxazin-3(4H)-one (1a-b), 2H-1,4-benzoxazin-3(4H)-one (2a-b, 3a-b and 4b), and benzoxazolin-2-one (5a-b), as biologically active agents, is described.