Expanding the Scope of Palladium-Catalyzed B - N Cross-Coupling Chemistry in Carboranes.

Expanding the Scope of Palladium-Catalyzed B - N Cross-Coupling Chemistry in Carboranes.
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扩大了卡伯兰氏菌的钯催化的B-N交叉偶联化学范围。

DOI:
10.1021/acs.organomet.0c00576
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发表时间:
2020-12-14
期刊:
影响因子:
2.8
通讯作者:
Spokoyny AM
Spokoyny AM
中科院分区:
化学2区
文献类型:
--
作者:
Mu X;Hopp M;Dziedzic RM;Waddington MA;Rheingold AL;Sletten EM;Axtell JC;Spokoyny AM

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在过去的几年里,出现了一些使二碳杂环十二烷(碳硼烷)功能化的战略。尽管有这些进展,碳硼烷支架上B-N键的形成仍然是一个挑战,因为强亲核试剂倾向于将母体紧密碳硼烷簇部分脱硼成相应的NIDO形式。在这里,我们展示了叠氮、磺胺、氰酸酯和磷酰胺的亲核剂可以直接从易于获得的前体交叉偶联到o-和m-碳硼烷核心的B(9)顶点上,而不会产生明显的脱碳副产物,为进一步研究这些新的B-胺化碳硼烷的用途和性质奠定了基础。我们进一步展示了已安装官能团的选择性反应性,突出了一些独特的特征,这些特征源于电子供体B(9)位置和B连接的碳硼烷取代基的大空间构型的组合。
Over the past several years, a number of strategies for the functionalization of dicarba-closo-dodecaboranes (carboranes) have emerged. Despite these developments, B – N bond formation on the carborane scaffold remains a challenge due to the propensity of strong nucleophiles to partially deboronate the parent closo-carborane cluster into the corresponding nido form. Here we show that azide, sulfonamide, cyanate, 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 by-products, laying the groundwork for further study into the utility and properties of these new B-aminated carborane species. We further showcase select reactivity of the installed functional groups highlighting some unique features stemming from the combination of the electron-donating B(9) position and the large steric profile of the B-connected carborane substituent.
DOI: 10.1021/acs.inorgchem.5b01252
发表时间: 2015-07-20
影响因子: 4.6
作者:
Barnett, Brandon R.;Labios, Liezel A.;Figueroa, Joshua S.
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发表时间: 2009-05-25
期刊: ORGANOMETALLICS
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发表时间: 2019-08-16
影响因子: 3.4
作者:
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通讯作者: Spokoyny AM