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
Transition-Metal-Free Diarylation of Isocyanates with Arynes
作者:Woo Cheol Jang、Dong Wook Hwang、Jeong Hoon Seo、Haye Min Ko
DOI:10.1016/j.tetlet.2019.151018
日期:2019.9
A facile method for the transition-metal-free diarylation of isocyanates with arynes in the presence of cesium fluoride has been developed, which affords functionalized diaryl amines in moderate to excellent yields. This reaction has good functional group tolerance and provides excellent regioselectivity by utilizing a methoxy-substituted aryne precursor.
Transition-metal-free synthesis of aromatic amines via the reaction of benzynes with isocyanates
作者:Jeong Hoon Seo、Haye Min Ko
DOI:10.1016/j.tetlet.2018.01.022
日期:2018.2
unexpected reaction between benzynes and isocyanates to generate aromatic amines has been developed under transition-metal-free conditions. The in situ prepared anions formed through cleavage of the NC bond in isocyanates, reacted with aryne precursors to afford various aniline derivatives in moderate to excellent yield and tolerated various substituents on the o-silyl aryl triflate and the isocyanate.
Three-Component Reactions of Arynes, Amines, and Nucleophiles via a One-Pot Process
作者:Gyoungwook Min、Jeongseob Seo、Haye Min Ko
DOI:10.1021/acs.joc.8b01058
日期:2018.8.3
An unprecedented three-component reaction of arynes, tertiary amines, and nucleophiles has been demonstrated through ammonium salt intermediates. This protocol allows access to tertiary aniline derivatives containing the piperazine motif in good-to-excellent yields. Expansively, this reaction can produce biologically important 2-(4-phenylpiperazin-1-yl)ethyl-containing molecules using arynes, 1,4-diazabicyclo(2
Aryne 1,2,3-Trifunctionalization with Aryl Allyl Sulfoxides
作者:Yuanyuan Li、Dachuan Qiu、Rongrong Gu、Junli Wang、Jiarong Shi、Yang Li
DOI:10.1021/jacs.6b06981
日期:2016.8.31
An aryne 1,2,3-trisubstitution with aryl allyl sulfoxides is accomplished, featuring an incorporation of C-S, C-O, and C-C bonds on the consecutive positions of a benzene ring. The reaction condition is mild with broad substrate scope. Preliminary mechanistic study suggests a cascade formal [2 + 2] reaction of aryne with S═O bond, an allyl S → O migration, and a Claisen rearrangement.
芳烃 1,2,3-三取代与芳基烯丙基亚砜完成,其特点是在苯环的连续位置上引入 CS、CO 和 CC 键。反应条件温和,底物范围广。初步机理研究表明,芳炔与 S=O 键发生级联形式的 [2 + 2] 反应、烯丙基 S → O 迁移和克莱森重排。