Multicomponent Reactions Involving Arynes, Quinolines, and Aldehydes
作者:Anup Bhunia、Digvijay Porwal、Rajesh G. Gonnade、Akkattu T. Biju
DOI:10.1021/ol4023134
日期:2013.9.6
The multicomponentreaction involving arynes, quinolines, and aldehydes leading to the diastereoselective synthesis of benzoxazino quinoline derivatives in good yields proceeding via 1,4-zwitterionic intermediates is reported. In addition, the synthetic potential of various carbonyl compounds in this reaction as well as the utility of isoquinoline as the nucleophilic trigger has been examined.
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.
Benzyne‐Induced Ring Opening Reactions of DABCO: Synthesis of 1,4‐Disubstituted Piperazines and Piperidines
作者:Jeongseob Seo、Daegeun Kim、Haye Min Ko
DOI:10.1002/adsc.202000375
日期:2020.7.16
strategies for its synthesis to date have required multistep methods and have been very limited, such as the use of SNAr‐type reactions. Herein, we describe a synthetic methodology employing benzynes, 1,4‐diazabicyclo(2.2.2)octane (DABCO), and nitrogen nucleophiles to access these privileged organic compounds. The established protocol proved to be a transition‐metal‐free, mild reaction that proceeded via
2-(4-苯基哌嗪-1-基)乙-1-胺支架是结构上重要的基序,在药物和药物化学中经常出现。尽管该部分具有重要意义,但迄今为止,其合成的一般策略仍需要多步方法,并且非常局限,例如使用S N Ar型反应。在这里,我们描述了一种合成方法,该方法使用苯炔,1,4-二氮杂双环(2.2.2)辛烷(DABCO)和氮亲核试剂来访问这些特权有机化合物。业已证明的既定规程是无过渡金属的轻度反应,其反应是通过由苯甲酸和DABCO形成的季铵盐进行的。
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