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Amine-Promoted anti-Markovnikov Addition of 1,3-Dicarbonyl Compounds with Terminal Alkynes under Rhenium Catalysis

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journal contribution
posted on 04.05.2018 by Masahito Murai, Erika Uemura, Kazuhiko Takai
Amines have been identified to greatly accelerate the intermolecular anti-Markovnikov addition of carbon nucleophiles to unactivated terminal alkynes. Using a combination of [ReBr­(CO)3(thf)]2 and iPr2NEt, construction of cyclic all-carbon quaternary centers was achieved with various 1,3-ketoesters, diketones, and diesters with lower catalyst loading under milder conditions. The type of addition could be easily controlled by choice of additive, highlighting the unique features of rhenium catalysis