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Nickel-catalyzed deaminative Sonogashira coupling of alkylpyridinium salts enabled by NN2 pincer ligand

Xingjie Zhang (), Di Qi, Chenchen Jiao, Xiaopan Liu and Guisheng Zhang ()
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Xingjie Zhang: Henan Normal University
Di Qi: Henan Normal University
Chenchen Jiao: Henan Normal University
Xiaopan Liu: Henan Normal University
Guisheng Zhang: Henan Normal University

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Alkynes are amongst the most valuable functional groups in organic chemistry and widely used in chemical biology, pharmacy, and materials science. However, the preparation of alkyl-substituted alkynes still remains elusive. Here, we show a nickel-catalyzed deaminative Sonogashira coupling of alkylpyridinium salts. Key to the success of this coupling is the development of an easily accessible and bench-stable amide-type pincer ligand. This ligand allows naturally abundant alkyl amines as alkylating agents in Sonogashira reactions, and produces diverse alkynes in excellent yields under mild conditions. Salient merits of this chemistry include broad substrate scope and functional group tolerance, gram-scale synthesis, one-pot transformation, versatile late-stage derivatizations as well as the use of inexpensive pre-catalyst and readily available substrates. The high efficiency and strong practicability bode well for the widespread applications of this strategy in constructing functional molecules, materials, and fine chemicals.

Date: 2021
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DOI: 10.1038/s41467-021-25222-1

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