1: 2-trimethylsilanyl-thiazole With n-butyllithium in tetrahydrofuran T=-78°C; 0.833333 h; Inert atmosphere; 2: boric acid trimethyl ester in tetrahydrofuran T=-78 - 20°C; 1.25 h; Inert atmosphere; 3: With hydrogenchloride; water in tetrahydrofuran pH=2; Inert atmosphere;