Journal
TETRAHEDRON
Volume 127, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2022.133075
Keywords
Arylation; Cross-coupling; 78-Dibromo [5]helicene; Palladium catalysis; Suzuki-Miyaura
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Funding
- graduate research and innova-tion foundation of Chongqing of China
- National Natural Science Foundation of China
- Natural Science Foun-dation Project of CQ CSTC
- [CYS17018]
- [21372265]
- [21350110501]
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A series of arylated [5]helicenes were effectively obtained through palladium catalyzed Suzuki-Miyaura reaction under mild conditions. The optical properties of [5]helicene derivatives were studied and showed red-shift compared to [5]helicene. This Pd-catalyzed coupling provides an effective protocol for the synthesis of mono-/bisalkyl [5]helicenes.
A series of arylated [5]helicenes have been effectively obtained through palladium catalyzed Suzuki-Miyaura reaction, starting from 7,8-dibromo [5]helicene under mild conditions. Optical properties of [5]helicene derivatives were studied by UV-vis and fluorescence spectra, and both maximum absorption wavelength and emission wavelength showed red-shift compared with [5]helicene. This Pd-catalyzed coupling provides an effective protocol for synthesis of mono-/bisalkyl [5]helicenes.(c) 2022 Elsevier Ltd. All rights reserved.
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