bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine T=20°C; Sonogashira coupling;

1: With tert.-butylnitrite; boron trifluoride diethyl etherate in diethyl ether T=-20 - 5°C; 2: With iodine; sodium iodide in acetonitrile T=20°C; 1 h;