1: phenylacetic acid With benzotriazol-1-ol; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine in tetrahydrofuran T=20°C; 0.25 h; Inert atmosphere; 2: 2-amino-5-nitro-1,3-thiazole in tetrahydrofuran T=20°C; 24 h; Inert atmosphere;