1: 1,2-dihydroquinoxalin-2-one With triethylamine; bromo-tris(1-pyrrolidinyl)phosphonium hexafluorophosphate in 1,4-dioxane T=25°C; 2 h; Inert atmosphere; 2: phenylacetylene With bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide in 1,4-dioxane T=25°C; Sonogashira coupling; 3 h; Inert atmosphere;

copper(l) iodide; tetrakis(triphenylphosphine) palladium(0); N-ethyl-N,N-diisopropylamine in water T=20°C; 22 h;

1: With potassium tert-butylate in N,N-dimethyl-formamide T=-20°C; 0.5 h; Inert atmosphere; 2: With acetic acid in N,N-dimethyl-formamide T=-20°C; Inert atmosphere;

potassium tert-butylate in N,N-dimethyl-formamide T=-20°C;

bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine in dimethyl sulfoxide 6 h;