direct CH arylation of (hetero)arenes. Starting from an aniline, the corresponding arenediazonium ion is generated in situ and immediately reduced by vitamin C to an aryl radical that undergoes a homolytic aromatic substitution with a (hetero)arene. Notably, neither heating nor irradiation is required. This procedure is mild, operationally simple, and constitutes a greener approach to arylation.
Metal-Free, Visible-Light-Mediated Direct C–H Arylation of Heteroarenes with Aryl Diazonium Salts
作者:Durga Prasad Hari、Peter Schroll、Burkhard König
DOI:10.1021/ja212099r
日期:2012.2.15
Visible light along with 1 mol % eosinYcatalyzes the direct C-H bond arylation of heteroarenes with aryl diazonium salts by a photoredox process. We have investigated the scope of the reaction for several aryl diazonium salts and heteroarenes. The general and easy procedure provides a transition-metal-free alternative for the formation of aryl-heteroaryl bonds.
可见光和 1 mol% 曙红 Y 通过光氧化还原过程催化杂芳烃与芳基重氮盐的直接 CH 键芳基化。我们研究了几种芳基重氮盐和杂芳烃的反应范围。通用且简单的程序为芳基-杂芳基键的形成提供了一种不含过渡金属的替代方法。
C-H Arylation of <i>N</i>
-Heteroarenes under Metal-Free Conditions and its Application towards the Synthesis of Pentabromo- and Pentachloropseudilins
作者:Mukesh Kumar、Shweta Sharma、Parijat Sil、Manoj Kushwaha、Satyajit Mayor、Ram A. Vishwakarma、Parvinder Pal Singh
DOI:10.1002/ejoc.201900353
日期:2019.6.16
Herein, we have developed a metal‐free and mild condition for the synthesis of 2‐arylated heteroarenes. The complex forming property and charge transfer property of phenothiazine expanded its application towards catalysis The optimized condition has been successfully employed for the synthesis important marine natural product namely pentabromo/chloropseudilins (PBP/PCP). The synthesized Pentachloropseudilin
Sensitized Photografting of Diazonium Salts by Visible Light.
作者:Meriem Bouriga、Mohamed M. Chehimi、Catherine Combellas、Philippe Decorse、Frédéric Kanoufi、Alain Deronzier、Jean Pinson
DOI:10.1021/cm3032994
日期:2013.1.8
Visible irradiation of a gold surface dipped into a solution of diversely substituted aryldiazonium salts in the presence of a photosensitizer (Ru(bipy)32+ or eosinY) leads to a modification of the surface by attached aryl groups. A grafted nanometer thick polyphenylene film is obtained. The reaction is extended to a polyvinylchloride (PVC) surface. The mechanism proposed for the formation of this
Merging visible-light photoredox and micellar catalysis: arylation reactions with anilines nitrosated <i>in situ</i>
作者:Mei-jie Bu、Guo-ping Lu、Jianzhong Jiang、Chun Cai
DOI:10.1039/c8cy01221k
日期:——
utilized as the photocatalyst, and Triton X-100 was employed as the surfactant; both are inexpensive and commercially available. This clean and energy-saving catalytic system enables photocatalytic reactions of the diazonium ion generated in situ to proceed smoothly in water without any co-solvents or additives at room temperature.