Benzyne 1,2,4-Trisubstitution and Dearomative 1,2,4-Trifunctionalization
作者:Jiarong Shi、Lianggui Li、Chunhui Shan、Zhonghong Chen、Liang Dai、Min Tan、Yu Lan、Yang Li
DOI:10.1021/jacs.1c04389
日期:2021.7.21
4-trifunctionalization of benzyne have been accomplished from sulfoxides bearing a penta-2,4-dien-1-yl moiety. These cascade transformations proceed through a benzyne insertion into the S═O bond and an uncommon regiospecific anionic [4,5]-sigmatropic rearrangement, furnishing a C–O, C–S, and C–C bond on the C1-, C2-, and C4-position of a benzene ring, respectively. This study showcases new cascade benzyne reaction
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.
Bromothiolation of Arynes for the Synthesis of 2-Bromobenzenethiol Equivalents
作者:Shinya Tabata、Suguru Yoshida
DOI:10.1021/acs.orglett.4c00944
日期:2024.5.10
A new method to synthesize o-bromobenzenethiol equivalents through aryne intermediates is disclosed. Various o-bromobenzenethiol equivalents are prepared by the bromothiolation of aryne intermediates with potassium xanthates. Aryl xanthates serve in the synthesis of diverse organosulfurs involving phenothiazines and thianthrenes by further transformations.
A diverse array of amino- and alkoxybenziodoxoles can be easily synthesized by reacting the respective amines and alcohols with chlorobenziodoxole. These iodane compounds undergo insertion of arynes into the N−I(III) and O−I(III) bonds to give ortho-amino- and alkoxy-arylbenziodoxoles, the iodane group of which can be leveraged as a versatile leaving group for downstream transformations.