鉴于 2-羟基联芳基化合物在有机化学、药物化学和材料化学中的重要作用,合成这种常见基序的简明方法非常有价值。在寻求扩展合成化学家在这方面的词典时,我们开发了一种使用现成的硼酸对苯酚和萘酚进行邻位芳基化的权宜之计和通用策略。我们的方法依赖于通过伸缩的 B 到 Bi 转金属和氧化从工作台稳定的 Bi(III) 前体原位生成独特的反应性 Bi(V) 芳基化剂。通过利用与传统金属催化歧管正交的反应性,多种芳基和杂芳基伙伴可以在温和条件下与苯酚和萘酚快速偶联。芳基化后,Bi(III)前体的高产率回收允许其在后续反应中有效地重复使用。对该方法的每个关键步骤的机械询问为其实际应用提供了信息,并提供了对有机铋化合物未充分利用的反应性的基本见解。
A general synthesis of resin-bound triaryl bismuthanes and resin-bound triaryl bismuth diacetates starting from commercially available chloromethyl polystyrene is reported. For the first time resin-bound bismuth has been utilized as part of a multidirectional linker system for solid-phase organic synthesis and as a resin-bound arylation reagent.
Carbon–Oxygen Homocoupling of 2-Naphthols through Electrochemical Oxidative Dearomatization
作者:Ting Chen、Song Chen、Shaomin Fu、Song Qin、Bo Liu
DOI:10.1055/s-0037-1611777
日期:2019.5
A homocoupling reaction of 2-naphthols with formation of a C–O bond through electrochemical oxidative dearomatization in the presence of catalytic amounts of ferrocene and a ruthenium complex was developed. Mechanistic studies revealed that the reaction might proceed through coupling between two identical radical species. Moreover, a gram-scale experiment was performed to illustrate the potential practicability
Dearomatizative azidation and peroxidation of [small beta]-naphthols have been explored using copper bromide as a catalyst. These reactions lead to highly valuable naphthalenone derivatives such as quaternary azide derivatives and quaternary...
Ru<sup>II</sup>-Catalyzed Vinylative Dearomatization of Naphthols via a C(sp<sup>2</sup>)–H Bond Activation Approach
作者:Jiang Nan、Zhijun Zuo、Lei Luo、Lu Bai、Huayu Zheng、Yini Yuan、Jingjing Liu、Xinjun Luan、Yaoyu Wang
DOI:10.1021/ja410060e
日期:2013.11.20
by sequential cleavage of the C(sp(2))-Hbond, migratory insertion of the alkyne, and dearomatization of the naphthyl ring. Various spirocyclic molecules bearing an all-carbon quaternary stereocenter could be obtained by this novel method with good yields and excellent regioselectivity, and the current process tolerates a variety of synthetically important functional groups.
Transition‐Metal‐Free Aryl–Aryl Cross‐Coupling: C−H Arylation of 2‐Naphthols with Diaryliodonium Salts
作者:Manoj K. Ghosh、Jan Rzymkowski、Marcin Kalek
DOI:10.1002/chem.201902204
日期:2019.7.22
Transition‐metal‐free regioselecitive C−H arylation of 2‐naphthols with diaryliodoniumsalts has been developed. The reaction proceeds under very simple experimental conditions and affords a range of products with various substitution patterns. The method allows for the incorporation of electron‐deficient aryls, which complements well currently existing metal‐free aryl–aryl cross‐couplings of phenols