1: 7-nitro-1H-benzo[d ][1,3]oxazine-2,4-dione With sodium hydride in N,N-dimethyl-formamide T=20°C; 2: methyl iodide in N,N-dimethyl-formamide T=20°C; 4 h;

oxygen; copper diacetate; palladium diacetate; potassium iodide; 2,2,2-trimethylacetic acid in acetonitrile T=60°C; P=760.051 Torr; regioselective reaction;

(i) aq. NaOH, (ii) /BRN= 385653/, (iii) AcCl; Multistep reaction;