Improved synthesis of icosahedral carboranes containing exopolyhedral B C and C C bonds
作者:Kierstyn P. Anderson、Harrison A. Mills、Chantel Mao、Kent O. Kirlikovali、Jonathan C. Axtell、Arnold L. Rheingold、Alexander M. Spokoyny
DOI:10.1016/j.tet.2018.11.040
日期:2019.1
this method is tolerant towards alkyl-based Grignard reagents containing β-hydrogens. Furthermore, a transition metal-free approach to the substitution of carborane C-vertices with (hetero)aryl substrates has been developed under nucleophilic aromatic substitution (SNAr) conditions. The selective substitution of carboranes afforded by these methods holds potential for the rational synthesis of heterofunctionalized
Regioselective Insertion of Carborynes into Ethereal C−H Bond: Facile Synthesis of α-Carboranylated Ethers
作者:Sunewang R. Wang、Zaozao Qiu、Zuowei Xie
DOI:10.1021/ja201126h
日期:2011.4.20
Carborynes can exist in two resonance forms, bonding form vs biradical form. The biradical form can be readily generated via the elimination of LiI from 1-iodo-n-lithio-1,n-C(2)B(10)H(10) (n = 2, 7) under UV irradiation. They can undergo α-C-Hbondinsertion with aliphatic ethers, affording α-carboranylated ethers in excellent regioselectivity at room temperature. This serves as a new methodology for
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
Diels-Alder Reaction of<i>o</i>-Carboryne with Fulvenes: Synthesis of Carboranonorbornadienes and Their Transformations
作者:Jie Zhang、Zaozao Qiu、Peng-Fei Xu、Zuowei Xie
DOI:10.1002/cplu.201402129
日期:2014.7
o‐Carboryne (1,2‐dehydro‐o‐carborane) generated in situ from the precursor 1‐iodo‐2‐lithio‐o‐carborane reacts with 6,6′‐diarylfulvenes to give a series of carboranonorbornadienes in moderate yields with excellent regioselectivity. The resultant [4+2] cycloadducts can be further derivatized, thus leading to the formation of a variety of highly functionalized carboranes. This study shows that such Diels–Alder