Use of 2-Bromophenylboronic Esters as Benzyne Precursors in the Pd-Catalyzed Synthesis of Triphenylenes
作者:José-Antonio García-López、Michael F. Greaney
DOI:10.1021/ol5006246
日期:2014.5.2
aryl boronates are introduced as aryne precursors for transition-metal-catalyzed transformations. On treatment with tBuOK and Pd(0), metal-bound aryne intermediates are formed that undergo effective trimerization to form useful triphenylene compounds. For meta-substituted arynes, the 3:1 product ratio in favor of non-C3 symmetric material is indicative of a benzyne mechanism.
Decarbonylative/decarboxylative [4 + 2] annulation of phthalic anhydrides and cyclic iodoniums towards triphenylenes
作者:Lingyu Huang、Rongrong Xie、Chaoying Wen、Yanyan Yang、Yiwen Wang、Shiyan Ren、Bin Huang、Shiqing Li
DOI:10.1039/d2ob00500j
日期:——
A palladium-catalyzed decarbonylative/decarboxylative annulation of phthalic anhydrides with cyclic diaryliodonium salts to synthesize triphenylenes has been developed.
<scp>Nickel‐Catalyzed</scp>
Electroreductive Syntheses of Triphenylenes Using
<scp>
<i>ortho</i>
‐Dihalobenzene‐Derived
</scp>
Benzynes
作者:Zhao‐Ming Li、Bin Shuai、Cong Ma、Ping Fang、Tian‐Sheng Mei
DOI:10.1002/cjoc.202200245
日期:2022.10
Electrochemical nickel-catalyzed syntheses of triphenylenes by a) reductive trimerization of ortho-dibromobenzenes or ortho-bromoarylsulfurofluoridates, or b) reductive cross-coupling of ortho-dibromobenzenes to 2,2’-diiodobiphenyls, are described. The former provides a practical means for the construction of triphenylene derivatives in up to 87% isolated yield at room temperature. For 1,2-dihalo-3-methylbenzenes
A brand-new Pd-mediated generation of benzyne and its [2+2+2] cycloaddition: δ-carbon elimination and concomitant decarboxylation
作者:Hoo Sook Kim、Saravanan Gowrisankar、Eun Sun Kim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2008.09.017
日期:2008.11
We found a brand-new method for the generation of aryne from methyl 2-bromobenzoates via the Pd-mediated concomitant delta-carbon elimination and decarboxylation. The generated arynes underwent Pd-mediated [2+2+2] cycloaddition to give triphenylenes. (C) 2008 Elsevier Ltd. All rights reserved.
Gold-catalyzed cyclotrimerization of arynes for the synthesis of triphenylenes
A novel and efficient Au(I)-catalyzed cyclotrimerization of arynes, generated by fluoride-induced elimination of Kobayashi's silylaryl triflates, is described. The reactions led to the formation of triphenylenes in 45-88% yields under mild conditions. (C) 2015 Elsevier B.V. All rights reserved.