首页 | 本学科首页   官方微博 | 高级检索  
     检索      


The Photocatalyzed Meerwein Arylation: Classic Reaction of Aryl Diazonium Salts in a New Light
Authors:M Sc Durga Prasad Hari  Prof Dr Burkhard König
Institution:Department of Chemistry and Pharmacy, Universit?t Regensburg, Universit?tsstrasse 31, 93040 Regensburg (Germany)
Abstract:The use of diazonium salts for aryl radical generation and C? H arylation processes has been known since 1896 when Pschorr first used the reaction for intramolecular cyclizations. Meerwein developed it further in the early 1900s into a general arylation method. However, this reaction could not compete with the transition‐metal‐mediated formation of C(sp2)? C(sp2) bonds. The replacement of the copper catalyst with iron and titanium compounds improved the situation, but the use of photocatalysis to induce the one‐electron reduction and activation of the diazonium salts is even more advantageous. The first photocatalyzed Pschorr cyclization was published in 1984, and just last year a series of papers described applications of photocatalytic Meerwein arylations leading to aryl–alkene coupling products. In this Minireview we summarize the origins of this reaction and its scope and applications.
Keywords:arylation  catalysis  diazonium salts  radicals  visible light
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号