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Search: WFRF:(Li Xingzhen)

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1.
  • Li, Xingzhen, et al. (author)
  • Mono-N-Alkylation of Sulfonamides with Alcohols Catalyzed by Iridium N-Heterocyclic Carbene-Phosphine Complexes
  • 2022
  • In: Asian Journal of Organic Chemistry. - : Wiley. - 2193-5807 .- 2193-5815. ; 11:7
  • Journal article (peer-reviewed)abstract
    • A N-heterocyclic carbene-phosphine iridium complex is presented for the efficient and selective mono-N-alkylation of sulfonamides with alcohols based on a borrowing hydrogenation strategy. Herein, water is the only by-product and this methodology thus offers a more environmentally benign and interesting alternative to the use of traditional alkylating reagents. This facile protocol tolerates a large number of (hetero) aromatic and aliphatic sulfonamides as well as (hetero) aromatic and aliphatic alcohols to obtain the desired product is high isolated yield (up to 98%). The alkylation completely retards after the formation of the secondary sulfonamide and no over-alkylation was observed in all cases. The option to run the reaction under solvent-free conditions as well as the scalability of this borrowing hydrogenation are key features of this protocol.
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2.
  • Yang, Jianping, et al. (author)
  • Catalytic enantioselective synthesis of fluoromethylated stereocenters by asymmetric hydrogenation
  • 2022
  • In: Chemical Science. - : Royal Society of Chemistry (RSC). - 2041-6520 .- 2041-6539. ; 13:29, s. 8590-8596
  • Journal article (peer-reviewed)abstract
    • Fluoromethyl groups possess specific steric and electronic properties and serve as a bioisostere of alcohol, thiol, nitro, and other functional groups, which are important in an assortment of molecular recognition processes. Herein we report a catalytic method for the asymmetric synthesis of a variety of enantioenriched products bearing fluoromethylated stereocenters with excellent yields and enantioselectivities. Various N,P-ligands were designed and applied in the hydrogenation of fluoromethylated olefins and vinyl fluorides.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Andersson, Pher G (2)
Zhou, Taigang (2)
Yang, Jianping (2)
Li, Xingzhen (2)
Peters, Bram B. C. (2)
He, Lei (1)
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Ponra, Sudipta (1)
Massaro, Luca (1)
Tan, Min (1)
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University
Stockholm University (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)
Year
2022 (2)

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