Fluorocarbonylation via palladium/phosphine synergistic catalysis

Mingxin Zhao, Miao Chen, Tian Wang, Shuhan Yang, Qian Peng () and Pingping Tang ()
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Mingxin Zhao: Nankai University
Miao Chen: Nankai University
Tian Wang: Nankai University
Shuhan Yang: Nankai University
Qian Peng: Nankai University
Pingping Tang: Nankai University

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Despite the growing importance of fluorinated organic compounds in pharmaceuticals, agrochemicals, and materials science, the introduction of fluorine into organic molecules is still a challenge, and no catalytic fluorocarbonylation of aryl/alkyl boron compounds has been reported to date. Herein, we present the development of palladium and phosphine synergistic redox catalysis of fluorocarbonylation of potassium aryl/alkyl trifluoroborate. Trifluoromethyl arylsulfonate (TFMS), which was used as a trifluoromethoxylation reagent, an easily handled and bench-scale reagent, has been employed as an efficient source of COF2. The reaction operates under mild conditions with good to excellent yields and tolerates diverse complex scaffolds, which allows efficient late-stage fluorocarbonylation of marked small-molecule drugs. Mechanistically, the key intermediates of labile Brettphos-Pd(II)-OCF3 complex and difluoro-Brettphos were synthesized and spectroscopically characterized, including X-ray crystallography. A detailed reaction mechanism involving the synergistic redox catalytic cycles Pd(II)/(0) and P(III)/(V) was proposed, and multifunction of phosphine ligand was identified based on 19F NMR, isotope tracing, synthetic, and computational studies.

Date: 2023
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DOI: 10.1038/s41467-023-40180-6

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