作者:A. Ya. Usyatinsky、K. V. Budkina、P. V. Petrovskii、V. I. Bregadze
DOI:10.1007/bf00698511
日期:1995.4
The mercuration of substituted R2C2B10H9X-9 type carboranes (where R=m-H, X= Cl, Br, I, Me; R=o-H, X=Me) was studied. It was found that mercury atoms add to the boron atoms in position 10 ofmeta-carboranes and in position 12 ofortho-carboranes,i.e., to the boron atoms adjacent to the boron atom bonded to the X substituent. Symmetrical (R2C2B10H8X)2Hg type derivatives were obtained. It was shown that
Cage-Walking: Vertex Differentiation by Palladium-Catalyzed Isomerization of B(9)-Bromo-<i>meta</i>-Carborane
作者:Rafal M. Dziedzic、Joshua L. Martin、Jonathan C. Axtell、Liban M. A. Saleh、Ta-Chung Ong、Yun-Fang Yang、Marco S. Messina、Arnold L. Rheingold、K. N. Houk、Alexander M. Spokoyny
DOI:10.1021/jacs.7b04080
日期:2017.6.14
We report the first observed Pd-catalyzed isomerization (“cage-walking”) of B(9)-bromo-meta-carborane during Pd-catalyzedcross-coupling, which enables the formation of B–O and B–N bonds at all boron vertices (B(2), B(4), B(5), and B(9)) of meta-carborane. Experimental and theoretical studies suggest this isomerization mechanism is strongly influenced by the steric crowding at the Pd catalyst by either
[EN] CARBORANE-BASED HISTONE DEACETYLASE (HDAC) INHIBITORS<br/>[FR] INHIBITEURS D'HISTONE DÉSACÉTYLASE (HDAC) À BASE DE CARBORANE
申请人:UNIV CALIFORNIA
公开号:WO2020117976A1
公开(公告)日:2020-06-11
The present disclosure provides compounds and compositions capable of treating cancer, a disease of the central nervous system, and an inflammatory autoimmune disease, and methods of use thereof.
Noncatalytic Bromination of Icosahedral Dicarboranes: The Key Role of Anionic Bromine Clusters Facilitating Br Atom Insertion into the B–H σ-Bond
作者:Andrey V. Shernyukov、George E. Salnikov、Dmitry A. Rudakov、Alexander M. Genaev
DOI:10.1021/acs.inorgchem.0c03392
日期:2021.3.1
theoretically. We found that the reactions of o- and m-carboranes 1 and 2 with elemental bromine are first order in the substrate but unusually high (approximately fifth) order in bromine. The calculated energy barriers of these reactions decrease sharply as more bromine molecules are added to the quantum-chemical system. A considerable primary deuterium kinetic isotopeeffect for the bromination of 2 indicates
Expanding the Scope of Palladium-Catalyzed B–N Cross-Coupling Chemistry in Carboranes
作者:Xin Mu、Morgan Hopp、Rafal M. Dziedzic、Mary A. Waddington、Arnold L. Rheingold、Ellen M. Sletten、Jonathan C. Axtell、Alexander M. Spokoyny
DOI:10.1021/acs.organomet.0c00576
日期:2020.12.14
and phosphoramidate nucleophiles can be straightforwardly cross-coupled onto the B(9) vertices of the o- and m-carborane core from readily accessible precursors without significant deboronation byproducts, laying the groundwork for further study into the utility and properties of these new B-aminated carborane species. We further showcase the select reactivity of the installed functional groups, highlighting
在过去的几年中,许多用于dicarba-的功能化战略闭合碳-dodecaboranes(碳硼烷)已经出现。尽管有这些进展,对碳硼烷骨架B-N键的形成仍然是一个挑战,由于强的亲核试剂的倾向部分deboronate父闭合碳-carborane簇成相应的巢式形式。在这里,我们表明叠氮化物、磺酰胺、氰酸盐和氨基磷酸酯亲核试剂可以直接交叉耦合到o - 和m的 B(9) 顶点-碳硼烷核心来自易于获得的前体,没有显着的脱硼副产物,为进一步研究这些新的 B-胺化碳硼烷物种的效用和性质奠定了基础。我们进一步展示了安装的官能团的选择性反应性,突出了一些独特的特征,这些特征源于供电子 B(9) 位置和 B 连接碳硼烷取代基的大空间分布的组合。