In the presence of 4Å MS, using N,N-dimethylformamide (DMF) as solvent, a mixture of terminal acetylene, cesium hydroxide and element selenium was stirred under N2 atomsphere at room temperature for 2 h, then diaryliodonium salts were added and the resulting mixture was stirred at 0 ℃ for 30 h to give acetylenic selenides in about 60% yields .

Key words: acetylenic selenide, cesium hydroxide, diaryliodonium salt, selenium