The preparation of several new oxazine derivatives I [X = CH, N; R = H, Br, (4-morpholinoaniline); R1 = NH2, NH2C(O)(4-ClC6H4)] was described in preliminary report.The multicomponent reaction of benzaldehyde, phenylacetylene and urea in the presence of trifluoroacetic acid and acetic acid resulted in compound I [X = CH, N; R = H, Br, R1 = NH2] was described.Compound I [X = CH, N; R = H, Br, R1 = NH2] was successfully acylated with 4-chlorobenzoyl chloride under an inert atm. to yield compound I [X = CH, N; R = H, Br; R1 = NHC(O)(4-ClC6H4)].Compound I [X = N; R = Br, R1 = NH2] reacted with 4-morpholinoaniline in acid using n-butanol as a solvent at 180°C to result in compound I [X = N; R = (4-morpholinoaniline), R1 = NH2].The new compounds I were evaluated for their antibacterial activities against bacterial strains in a disk diffusion method, using tetracycline as pos. control.