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Palladium-catalyzed oxidative carbonylative coupling of arylboronic acids with terminal alkynes to alkynones. 2014
Leibniz-Institut für Katalyse an der Universität Rostock, Albert-Einstein-Straße 29a, 18059 Rostock, Germany. xiao-feng.wu@catalysis.de.
We describe here an interesting palladium-catalyzed oxidative carbonylation of arylboronic acids with terminal alkynes. By the appropriate combination of a palladium salt, a ligand, and an oxidant, the desired alkynones were isolated in moderate to good yields. Notably, all the reactions were performed at room temperature, and moisture and air can be tolerated by this procedure. More importantly, this is the first example of oxidative carbonylative coupling of arylboronic acids with alkynes which filled the missing link in carbonylative coupling reactions.
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