亲核芳香取代对一系列功能化五氟苯具有高度对位选择性。在这里,我们展示了亲核芳香取代化学在制备氟化荧光低分子量有机凝胶中的效用。分子设计,合成和从一类新的热可逆的和荧光低分子量有机凝胶的光物理性能对位描述了烷氧基官能化的氟化三联苯。CuI催化的脱羧交叉偶联和亲核芳族取代化学均用于通过简单过滤从相应的氟苯甲酸钾盐和芳基碘以高产率和优异的纯度制备那些高度氟化的凝胶剂。制备了具有各种对端烷氧基尾部的各种氟化对称和不对称对三联苯。这些氟化三联苯使用 X 射线晶体学、差示扫描量热法、傅里叶变换红外光谱以及1 H、13 C 和19F 核磁共振。这些新材料的紫外可见光吸收和发射光谱分别显示出溶剂化变色和溶剂化氟变色行为。产生的氟化三联苯通过协同的π-π堆积和范德华相互作用发生自组装,导致各种有机溶剂凝胶化。扫描电子显微镜显示纤维状纳米结构的形成。探索了一些选定的氟化对称和不对称对三联苯的细胞毒性。
Copper-Catalyzed Decarboxylative Cross-Coupling of Potassium Polyfluorobenzoates with Aryl Iodides and Bromides
作者:Rui Shang、Yao Fu、Yan Wang、Qing Xu、Hai-Zhu Yu、Lei Liu
DOI:10.1002/anie.200904916
日期:2009.11.23
For copper only: The decarboxylative cross‐coupling of readily accessible and nonvolatile potassiumpolyfluorobenzoates with aryliodides and bromides using a copper catalyst provides polyfluorobiaryls and polyfluorostilbenes in excellent yields (see scheme). Mechanistic analyses are reported for the title reaction.
Palladium-Catalyzed Zinc-Amide-Mediated CH Arylation of Fluoroarenes and Heteroarenes with Aryl Sulfides
作者:Shinya Otsuka、Hideki Yorimitsu、Atsuhiro Osuka
DOI:10.1002/chem.201502101
日期:2015.10.12
heteroarenes with aryl sulfides proceeds smoothly with the aid of a palladium–N‐heterocyclic carbene catalyst. A bulky zinc amide, TMPZnCl⋅LiCl, plays a key role as an effective base to generate the corresponding arylzinc species in situ. This arylation protocol is practically much easier to perform than our previous method, which necessitates preparation of the arylzincreagents in advance from the corresponding
Ç polyfluoroarenes和杂芳烃的与芳基硫化物ħ芳基化用钯- N-杂环卡宾催化剂的帮助下顺利进行。甲笨重锌酰胺,TMPZnCl ⋅的LiCl,起着以原位产生相应的芳基锌物种的有效碱关键作用。该芳基化方案实际上比我们以前的方法更容易执行,后者需要从相应的芳基卤化物预先制备芳基锌试剂。通过硫特异性反应(如S N Ar磺酰化反应和扩展的Pummerer反应)制备的芳基硫化物会经历这种直接芳基化,从而提供有趣的转化,而这些转化是传统的基于卤素的有机合成难以实现的。
A General Method for Copper-Catalyzed Arylation of Arene C−H Bonds
作者:Hien-Quang Do、Rana M. Kashif Khan、Olafs Daugulis
DOI:10.1021/ja805688p
日期:2008.11.12
A generalmethod for copper-catalyzedarylation of sp (2) C-Hbonds with p K a's below 35 has been developed. The method employs aryl halide as the coupling partner, lithium alkoxide or K 3PO 4 base, and DMF, DMPU, or mixed DMF/xylenes solvent. A variety of electron-rich and electron-poor heterocycles such as azoles, caffeine, thiophenes, benzofuran, pyridine oxides, pyridazine, and pyrimidine can
Transition‐Metal‐Free Coupling of Polyfluorinated Arenes and Functionalized, Masked Aryl Nucleophiles
作者:Lucie Finck、Martin Oestreich
DOI:10.1002/chem.202101731
日期:2021.8.2
coupling of sufficiently electron-deficient fluorinatedarenes and functionalized N-aryl-N’-silyldiazenes as masked aryl nucleophiles is reported. The fluoride-promoted transformation involves the in situ generation of the aryl nucleophile decorated with various sensitive functional groups followed by a stepwise nucleophilic aromatic substitution (SNAr). These reactions typically proceed at room temperature
报道了足够缺电子的氟化芳烃和官能化的N-芳基-N'-甲硅烷基二氮烯作为掩蔽的芳基亲核试剂的化学选择性 C(sp 2 )-C(sp 2 ) 偶联。氟化物促进的转化涉及原位生成用各种敏感官能团修饰的芳基亲核试剂,然后逐步进行亲核芳族取代 (S N Ar)。这些反应通常在室温下在几分钟内进行。这种催化过程允许两个偶联伙伴的功能化,以良好的产率提供高度氟化的联芳基化合物。
COPPER-CATALYZED C-H BOND ARYLATION
申请人:Daugulis Olafs
公开号:US20090076266A1
公开(公告)日:2009-03-19
The present invention is a one-step method for efficiently converting carbon-hydrogen bonds into carbon-carbon bonds using a combination of aryl halides, a substrate, and a copper salt as catalyst. This method allows faster introduction of complex molecular entities, a process that would otherwise require many more steps. This invention is particularly relevant for the organic synthesis of complex molecules such as, but not limited to, pharmacophores and explosives.