Regioselective Insertion of<i>o</i>-Carborynes into the α-CH Bond of Tertiary Amines: Synthesis of α-Carboranylated Amines
作者:Da Zhao、Jiji Zhang、Zuowei Xie
DOI:10.1002/anie.201409141
日期:2014.11.17
insertion with tertiaryamines, thus affording α‐carboranylated amines in very good regioselectivity and isolated yields. In this process, the nucleophilic addition of tertiaryamines to the multiple bond of o‐carboryne generates a zwitterionic intermediate. An intramolecular proton transfer, followed by a nucleophilic attack leads to the formation of the final product. Thus, regioselectivity is highly
Ir-Catalyzed Selective B(3)-H Amination of <i>o</i>-Carboranes with NH<sub>3</sub>
作者:Yik Ki Au、Jie Zhang、Yangjian Quan、Zuowei Xie
DOI:10.1021/jacs.1c00593
日期:2021.3.24
Ammonia gas, NH3, is a cheap and widely used industrial feedstock, which has received tremendous research interests in its functionalization. This work reports a breakthrough in catalytic selective cage B(3)-H amination of o-carboranes with NH3 via Ir-catalyzed B-H/N-H dehydrocoupling, offering convenient and efficient access to a series of 3-NH2-o-carborane derivatives in moderate to high isolated
Visible-Light-Induced Palladium-Catalyzed Cross-Coupling of Iodocarboranes with (Hetero)Arenes
作者:Shimeng Li、Jie Zhang、Zuowei Xie
DOI:10.1021/acs.orglett.2c02648
日期:2022.10.21
radicals at the B3, B4, and B9 sites via a visible-light-promoted palladium(0)/palladium(I) pathway using readily available iodo-o-carboranes as the starting materials. The electrophilicities of these hypervalent boron-centered radicals decrease in the following order: B3 > B4 > B9. They are useful intermediates for the preparation of a family of cage B-(hetero)arylated o-carboranes at ambient temperature