Copper-catalyzed electrochemical cage C–H chalcogenation of o-carboranes has been realized to enable the synthesis of various cage C-sulfenylated and C-selenylated o-carboranes.
A palladium‐catalyzed direct C‐arylation reaction of readily available cage carboranyllithium reagents with arylhalides has been developed for the first time. This method is applicable to a wide range of arylhalide substrates including aryl iodides, aryl bromides, and heteroaromatic halides.
Nickel-Catalyzed Cross-Coupling Reactions of<i>o</i>-Carboranyl with Aryl Iodides: Facile Synthesis of 1-Aryl-<i>o</i>-Carboranes and 1,2-Diaryl-<i>o</i>-Carboranes
作者:Cen Tang、Zuowei Xie
DOI:10.1002/anie.201502502
日期:2015.6.22
A nickel‐catalyzed arylation at the carbon center of o‐carborane cages has been developed, thus leading to the preparation of a series of 1‐aryl‐o‐carboranes and 1,2‐diaryl‐o‐carboranes in high yields upon isolation. This method represents the first example of transition metal catalyzed C,C′‐diarylation by cross‐coupling reactions of o‐carboranyl with aryl iodides.
Selective Catalytic B–H Arylation of <i>o</i>-Carboranyl Aldehydes by a Transient Directing Strategy
作者:Xiaolei Zhang、Hongning Zheng、Jie Li、Fei Xu、Jing Zhao、Hong Yan
DOI:10.1021/jacs.7b07160
日期:2017.10.18
Carboranyl aldehydes are among the most useful synthons in derivatization of carboranes. However, compared to the utilization of carboranyl carboxylic acids in selective B-H bond functionalizations, the synthetic application of carboranyl aldehydes is limited due to the weakly coordinating nature of the aldehyde group. Herein, the direct arylation of o-carboranyl aldehydes has been developed via Pd-catalyzed
Photoarylation of Iodocarboranes with Unactivated (Hetero)Arenes: Facile Synthesis of 1,2‐[(Hetero)Aryl]
<sub>
<i>n</i>
</sub>
‐
<i>o</i>
‐Carboranes (
<i>n</i>
=1,2) and
<i>o</i>
‐Carborane‐Fused Cyclics
作者:Hangcheng Ni、Zaozao Qiu、Zuowei Xie
DOI:10.1002/anie.201610810
日期:2017.1.16
Photoarylation of iodocarboranes with unactivated arenes/heteroarenes at room temperature has been achieved, for the first time, thus leading to the facile synthesis of a large variety of cage carbon mono(hetero)arylated and di(hetero)arylated o‐carboranes. This work represents a clean, efficient, transition‐metal‐free, and cheap synthesis of functionalized carboranes, which has significant advantages over