Z-Selective (Cross-)Dimerization of Terminal Alkynes Catalyzed by an Iron Complex.
Orestes Rivada-WheelaghanSubrata ChakrabortyLinda J W ShimonYehoshoa Ben-DavidDavid MilsteinPublished in: Angewandte Chemie (International ed. in English) (2016)
Efficient iron-catalyzed homocoupling of terminal alkynes and cross-dimerization of aryl acetylenes with trimethylsilylacetylene is reported. The complex [Fe(H)(BH4 )(iPr-PNP)] (1) catalyzed the (cross-)dimerization of alkynes at room temperature, with no need for a base or other additives, to give the corresponding dimerized products with Z selectivity in excellent yields (79-99 %).
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