<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
描述了通过a)邻-二溴苯或邻-溴芳基磺基氟化物的还原三聚,或b)邻-二溴苯与2,2'-二碘代联苯的还原交叉偶联的电化学镍催化合成三亚苯。前者为在室温下以高达 87% 的分离收率构建苯并苯衍生物提供了一种实用的方法。对于 1,2-二卤代-3-甲基苯和相关的邻位三取代底物,三聚反应以非C 3h对称苯并苯异构体的高底物控制区域选择性进行。