Mild, visible light-mediated decarboxylation of aryl carboxylic acids to access aryl radicals
作者:L. Candish、M. Freitag、T. Gensch、F. Glorius
DOI:10.1039/c6sc05533h
日期:——
Herein we present the first example of aryl radical formation via the visible light-mediated decarboxylation of aryl carboxylic acids using photoredox catalysis.
在本文中,我们介绍了使用光氧化还原催化作用通过可见光介导的芳基羧酸脱羧形成芳基的第一个例子。
Dephosphinylative [4 + 2] Benzannulation of Phosphinyl Ynamines: Application to the Modular Synthesis of Polycyclic Aromatic Amines
syntheses of highly π-extended aminophenanthrenes and aminobenzonaphthothiophenes with different optical properties. Further application of this approach between 2,2″- and 2′,5′-dibromo-p-terphenyls with phosphinyl ynamines led to the regioselective formation of 6,13-diamino-5,12-dihalo- and 5,12-diamino-6,13-dihalo-dibenz[a,h]anthracenes via dual aminoethynylation and [4 + 2] benzannulation. The obtained
Selective Mechanochemical Monoarylation of Unbiased Dibromoarenes by <i>in Situ</i> Crystallization
作者:Tamae Seo、Koji Kubota、Hajime Ito
DOI:10.1021/jacs.0c01739
日期:2020.6.3
Palladium-catalyzed Suzuki-Miyaura cross-coupling reactions of liquid, unbiased dibromoarenes under mechanochemical conditions selectively afford the monoarylated products. The lower reactivity of the crystalline monoarylated products rela-tive to the liquid starting materials should be attributed predom-inantly to the low diffusion efficiency of the former in the re-action mixture, which results in
Pd‐Catalyzed versus Uncatalyzed, PhI(OAc)
<sub>2</sub>
‐Mediated Cyclization Reactions of
<i>N</i>
<sup>6</sup>
‐([1,1′‐Biaryl]‐2‐yl)Adenine Nucleosides
作者:Sakilam Satishkumar、Suresh Poudapally、Prasanna K. Vuram、Venkateshwarlu Gurram、Narender Pottabathini、Dellamol Sebastian、Lijia Yang、Padmanava Pradhan、Mahesh K. Lakshman
DOI:10.1002/cctc.201700918
日期:2017.11.9
3,3‐hexafluoroisopropanol (HFIP). Thus, under Pd catalysis and in HFIP, reactions proceed to provide carbazolyl nucleoside analogues, with some differences. If reactions of N6‐biarylyl nucleoside substrates were conducted in MeCN, formation of aryl benzimidazopurinyl nucleosidederivatives was observed in many cases by C−N bond formation with the N1 ring nitrogen atom of the purine (carbazole and benzimidazole
Palladium Catalyzed C–I and Vicinal C–H Dual Activation of Diaryliodonium Salts for Diarylations: Synthesis of Triphenylenes
作者:Xunshen Wu、Jianwei Han、Limin Wang
DOI:10.1021/acs.joc.7b01905
日期:2018.1.5
we report an approach for direct diarylations of 2-bromobiphenyls or bromobenzenes. As a result, a wide range of triphenylenes with various substituents have been synthesized in good yields. These triphenylenes are expected to be employed in the “bottom-up” synthesis of functional aromatic molecules in material science.