@article{2afb66276e24470ca52daa773b9ae978,
title = "Redox Potential Controlled Selective Oxidation of Styrenes for Regio- And Stereoselective Crossed Intermolecular [2 + 2] Cycloaddition via Organophotoredox Catalysis",
abstract = "A redox potential controlled intermolecular [2 + 2] cross-cycloaddition has been developed in the presence of a thioxanthylium photoredox catalyst. Electron-rich styrenes such as β-bromostyrene (Ep/2 = +1.61 V vs SCE) were selectively oxidized by a thioxanthylium photoredox catalyst (E1/2 (C*/C•-) = +1.76 V vs SCE) to styryl radical cations and reacted with styrene (Ep/2 = +1.97 V vs SCE) to furnish polysubstituted cyclobutanes in high yields. The present reaction can be successfully applied to intermolecular [2 + 2] cross-cycloaddition of β-halogenostyrenes, which cannot be effectively achieved by the hitherto reported representative organophotoredox catalysts.",
author = "Kenta Tanaka and Yoshinori Iwama and Mami Kishimoto and Naoya Ohtsuka and Yujiro Hoshino and Kiyoshi Honda and Yujiro Hoshino and Kiyoshi Honda",
note = "Funding Information: We thank Prof. Mahito Atobe of Yokohama National University for cyclic voltammetry measurements, and we also sincerely appreciate Prof. Norie Momiyama of the Institute for Molecular Science for her fruitful advice regarding mass analysis. This work was partly supported by the Nanotechnology Platform Program (Molecule and Material Synthesis) of the Ministry of Education Culture, Sports, Science and Technology (MEXT), Japan. Funding for this research was also provided by Yokohama National University (kyodo kenkyu suishin program B). Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",
year = "2020",
month = jul,
day = "2",
doi = "10.1021/acs.orglett.0c01852",
language = "English",
volume = "22",
pages = "5207--5211",
journal = "Organic Letters",
issn = "1523-7060",
publisher = "American Chemical Society",
number = "13",
}