sulfuric acid in ethanol 0.5 h; Microwave irradiation;

hydrogen iodide T=140°C;

1: lithium hydroxide hydrate / methanol / Microwave irradiation 2: iodine / dimethyl sulfoxide / 0.5 h / Microwave irradiation 3: sulfuric acid / ethanol / 0.5 h / Microwave irradiation View Scheme

1: iodine / dimethyl sulfoxide / 0.5 h / Microwave irradiation 2: sulfuric acid / ethanol / 0.5 h / Microwave irradiation View Scheme

1: lithium hydroxide hydrate / methanol / Microwave irradiation 2: iodine / dimethyl sulfoxide / 0.5 h / Microwave irradiation 3: sulfuric acid / ethanol / 0.5 h / Microwave irradiation View Scheme

1: AlCl3, aluminium chloride / nitrobenzene / |Reflux 2: potassium hydroxide / ethanol / 12 h / 30 °C 3: iodine / dimethyl sulfoxide / 0.5 h / 175 °C 4: hydrogenchloride; water / 0.5 h / |Reflux View Scheme

1: 6-amino-2-phenyl-4H-chromen-4-one; 4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl-4',4',5',5'-tetramethyl-1,3,2-dioxaborolane With tert.-butylnitrite in acetonitrile T=80°C; 2 h; 2: iodobenzene With tetrakis(triphenylphosphine) palladium(0); potassium carbonate in N,N-dimethyl-formamide T=100°C; Suzuki-Miyaura Coupling; 12 h; Inert atmosphere;