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Title
Japanese: 
English:Oxidative Desulfurization of Electron-Donating 5,5,7,7-Tetraaryl-5,7-dihydrodibenzo[c,e]thiepins and the Related Heterocycles: Generation of Dicationic Dyes upon Two-Electron Oxidation 
Author
Japanese: Takanori Suzuki, Takuma Kuroda, Hitomi Tamaoki, Sho Higasa, Tatsuo Nehira, Ryo Katoono, Yusuke Ishigaki, Kenshu Fujiwara, 福島 孝典, Hidetoshi Yamada.  
English: Takanori Suzuki, Takuma Kuroda, Hitomi Tamaoki, Sho Higasa, Tatsuo Nehira, Ryo Katoono, Yusuke Ishigaki, Kenshu Fujiwara, Takanori Fukushima, Hidetoshi Yamada.  
Language English 
Journal/Book name
Japanese: 
English:Heterocycles 2017 
Volume, Number, Page     95    816-829
Published date Jan. 31, 2017 
Publisher
Japanese: 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
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DOI https://doi.org/10.3987/COM-16-S(S)50
Abstract Upon oxidation of the title heterocycle (1A) with dimethylamino groups, elemental sulfur is extruded to form dicationic dye (1B2+), from which the starting dibenzothiepin derivative was generated by the reaction with Na2S. The bay-region substituents enhance configurational stability, so that, the optically pure heterocycles [(M)-2A, (M)-3A)] can be obtained in terms of helicity of one-handedness by starting with the corresponding optically pure dicationic dyes [(R)-2B2+, (R)-3B2+)]. Similar oxidative desulfurization occurs in dibenzo-1,5-oxathiocin 4A, a structurally related 8-membered heterocycle.

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