9-Stannafluorenes: 1,4-Dimetal Equivalents for Aromatic Annulation by Double Cross-Coupling
作者:Ikuhiro Nagao、Masaki Shimizu、Tamejiro Hiyama
DOI:10.1002/anie.200903779
日期:2009.9.28
Double or nothing! A straightforward and high‐yielding approach to a variety of polycyclic aromatic hydrocarbons has been achieved through palladium‐catalyzed annulation of 9,9‐dimethyl‐9‐stannafluorenes and dithienostannole with 1,2‐dihaloarenes (see scheme). In addition, 1,1‐dibromo‐1‐alkenes can also be applied to this annulation to produce dibenzofulvenes in excellent yields.
<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
作者:Wei-Zhen Wang、Qiang Wang、Xinglei He、Yi-Han Shen、Zi’ang Zhai、Ruiying Zhang、Yuanming Li、Ke-Yin Ye
DOI:10.1021/acs.orglett.4c00445
日期:2024.3.22
preparation of polycyclic aromatichydrocarbons (PAHs) by the Scholl reaction is typically performed by using superstoichiometric oxidants. Herein, we develop an electrochemical continuous-flow Scholl reaction to access PAHs that features a reduction in the use of supporting electrolytes and easy scale-up without changing the reaction conditions and setups. This reaction allows the synthesis of distorted