1: 5-bromo-N-methyl-2-nitroaniline With tin(ll) chloride in ethanol T=80°C; 4 h; 2: trimethyl orthoformate With toluene-4-sulfonic acid in toluene T=110°C; 15 h;

toluene-4-sulfonic acid in toluene 2 h; Heating / reflux;

copper(l) iodide; copper(l) chloride in 1-methyl-pyrrolidin-2-one T=200°C; 1.5 h; Microwave irradiationInert atmosphere;