Treatment of internal alkynes with Al powder, Pd/C and basic water in a methyltriphenylphosphonium bromide/ethylene glycol eutectic mixture resulted in highly chemoselective formation of ()-alkenes in a yield of up to 99% with / stereoselectivity ranging from 63/37 to 99/1. The unusual catalytic activity of Pd/C is thought to be modulated by the formation of a phosphine ligand.
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| http://dx.doi.org/10.1039/d3ob00433c | DOI Listing |
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