Cross-Coupling of Bis(<i>E</i>-2-bromovinyl)selenide with Terminal Acetylenes in a Presence of Pd(PPh<sub>3</sub>)<sub>4</sub>: a First Example of Vinylselenide Involvement in the Sonogashira Cross-Coupling
Bis( E -2-bromovinyl)selenide cross-couples with terminal acetylenes in a presence of Pd/CuI catalyst at room temperature involving both bromine atom and selanyl function and resulting in both substituted bis(1-buten-3ynyl)selenides and endiynes with a complete retention of the parent selenide configuration.