Synthesis of Diverse <i>o</i>-Arylthio-Substituted Diaryl Ethers by Direct Oxythiolation of Arynes with Diaryl Sulfoxides Involving Migratory <i>O</i>-Arylation
A diverse range of o-arylthio-substituted diarylethers has been synthesized by direct oxythiolation of arynes with diaryl sulfoxides that involves the formation of the C–O and C–S bonds followed by migratory O-arylation.
Transition-Metal-Free Synthesis of <i>N-</i>Arylphenothiazines through an <i>N</i>- and <i>S</i>-Arylation Sequence
作者:Tsubasa Matsuzawa、Takamitsu Hosoya、Suguru Yoshida
DOI:10.1021/acs.orglett.1c00515
日期:2021.3.19
transition-metal-free conditions is disclosed. An N- and S-arylation sequence of o-sulfanylanilines enabled us to synthesize a wide variety of N-arylphenothiazines. In particular, one-pot synthesis of N-arylphenothiazines was accomplished from easily available modules through preparation of o-sulfanylanilines by thioamination of aryne intermediates and following N- and S-arylation sequence.
Synthesis of Phenoxathiins and Phenothiazines by Aryne Reactions with Thiosulfonates
作者:Kazuya Kanemoto、Yuki Sakata、Takamitsu Hosoya、Suguru Yoshida
DOI:10.1246/cl.200132
日期:2020.5.5
Novel synthetic methods for phenoxathiins and phenothiazines by arynereactions are disclosed. We found that phenoxathiins were efficiently prepared by the reaction between aryne intermediates and ...
Palladium-Catalyzed Sulfinylation of Aryl- and Alkenylborons with Sulfinate Esters
作者:Minori Suzuki、Kazuya Kanemoto、Yu Nakamura、Takamitsu Hosoya、Suguru Yoshida
DOI:10.1021/acs.orglett.1c01292
日期:2021.5.7
An efficient, direct sulfinylation of organoborons catalyzed by palladium is disclosed. Treatment of organoborons and sulfinate esters in the presence of a palladium precatalyst provided a broad range of sulfoxides. Various organosulfur compounds having oxidizable functional groups were successfully prepared through the sulfoxide synthesis.
Facile Construction of Furanoacenes by a Three‐Step Sequence Going through Disilyl‐
<i>exo</i>
‐cyclic Dienes
作者:Yasunori Minami、Yuki Furuya、Tamejiro Hiyama
DOI:10.1002/chem.202001119
日期:2020.8.3
Facile synthesis of various benzonaphthofurans was achieved by intramolecular hydroarylation of 1,4‐disilyl‐2‐aryloxy‐1,3‐enynes followed by cycloaddition with arynes or alkenes and finally desilylaromatization. The three‐step transformation can be operated sequentially in one‐pot, providing with a range of furanoacenes easily and highly effectively.