1: 2,4-dibromo-1,3-thiazole With n-butyllithium in tetrahydrofuran T=-78°C; 0.5 h; 2: 4-acetylmorpholine in tetrahydrofuran T=-78°C; 2 h; Further stages.;
1: 4-acetylmorpholine With trichlorophosphate in 1,2-dichloro-ethane T=20°C; Cooling with ice; 2: salicylic acid in 1,2-dichloro-ethane T=20 - 95°C; 24.3333 h; 3: With water; sodium acetate in 1,2-dichloro-ethane T=90°C; 1 h;
