4.8 Article

Visible-Light-Induced Chemoselective Deboronative Alkynylation under Biomolecule-Compatible Conditions

Journal

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 136, Issue 6, Pages 2280-2283

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ja413208y

Keywords

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Funding

  1. National Basic Research Program of China [2014CB910304]
  2. National Natural Science Foundation of China [21272260]
  3. Thousand Talents Program Young Investigator Award
  4. Shanghai Pujiang Investigator Award [12PJ1410700]
  5. State Key Laboratory of Bioorganic and Natural Products Chemistry
  6. Chinese Academy of Sciences

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Here, we report a visible-light-induced deboronative alkynylation reaction, which is redox-neutral and works with primary, secondary and tertiary alkyl trifluoroborates or boronic acids to generate aryl, alkyl and silyl substituted alkynes. This reaction is highly chemoselective and performs well on substrates containing alkenes, alkynes, aldehydes, ketones, esters, nitriles, azides, aryl halides, alkyl halides, alcohols, and indoles, with no detectable occurrence of side reactions. The mechanism of this novel C(sp(3))-C(sp) bond coupling reaction was investigated by luminescence quenching, radical trapping, on-off light, and C-13-isotopic-labeling experiments. This reaction can be performed in neutral aqueous conditions, and it is compatible with amino acids, nucleosides, oligosaccharides, nucleic acids, proteins, and cell lysates.

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