Synthesis ofo-andm-carborane derivatives of [2,2]paracyclophane and abnormal Clemmensen reduction of ketones of the [2,2]paracyclophane and carborane series
作者:L. I. Zakharkin、V. A. Ol'shevskaya、L. E. Vinogradova
DOI:10.1007/bf02496219
日期:1997.6
andm-carboranyl substituents in position 4, separated from the [2,2]paracyclophane system by one or two C atoms (alcohols and ketones) were developed. The Clemmensenreduction of a number of ketones of the [2,2]paracyclophane ando-carbonane series occurs abnormally. The reduction of 1-benzoyl-o-carboranes to the corresponding alcohols by zinc in ethanol in a neutral medium was performed for the first
Synthesis, structure, and reactivity of C-isopropyl-ortho-carborane organoboron derivatives
作者:S. V. Svidlov、Ya. Z. Voloshin、N. S. Yurgina、T. V. Potapova、A. Yu. Belyy、I. V. Ananyev、Yu. N. Bubnov
DOI:10.1007/s11172-014-0745-x
日期:2014.10
A reaction of isopropyl-ortho-carborane with n-butyllithium, followed by treatment of the lithium derivative formed with boron trichloride, chlorodimethoxyborane, or chloropinacolatoborane furnished C-boryl-ortho-carboranes 1a-c. Further functionalization of 1-Cl2B-2-Pri-1,2-C2B10H10 (1a) with pentafluorophenylmagnesium bromide or pentafluorophenol led to 1-(C6F5)2B-2-Pri-1,2-C2B10H10 (2) and (1-(C6F5O)B-2-Pri-1
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
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
Formation of stable carbenoid ?-methoxyorganolithium compounds, 1-alkyl-2-lithiummethoxymethyl-o-carboranes, by metalation of 1-alkyl-2-methoxymethyl-o-carboranes withn-butyllithium
作者:L. I. Zakharkin、V. A. Ol'shevskaya、V. V. Guseva
DOI:10.1007/bf01433771
日期:1996.1
Abstract1-Alkyl-2-methoxymethyl-o-carboranes are easily metalated withn-butyllithium in an ether-benzene solution to form carbenoid 1-alkyl-2-lithiummethoxymethyl-o-carboranes, which are stable at room temperature. Under the action of H2O, CO2, and PhCHO these lithium carboranes yield the starting compounds, carboxylicacids, and benzyl alcohols, respectively.