The addition of secondary phosphine sulfides and selenides to alkynes proceeds readily (80 °C, 5–13 h) without catalysts or solvents to afford regio- and stereoselectively anti-Markovnikov adducts as tertiary alkenylphosphine chalcogenides of Z-configuration, in 60–94% yield.
Key words
addition reactions - alkynes - green chemistry - phosphine chalcogenides - regioselectivity