期刊
ORGANOMETALLICS
卷 39, 期 23, 页码 4380-4386出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.organomet.0c00576
关键词
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资金
- NIGMS [R35GM124746, 1DP2GM132680]
- Dreyfus Foundation
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 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 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.
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