The 9-Borataphenanthrene Anion.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION(2020)
摘要
The 9-borataphenanthrene anion is easily accessed by deprotonation of a 9,10-dihydro-9-boraphenanthrene and its diverse reactivity is investigated. Alkylation occurs at the carbon atom adjacent to boron, and room temperature hydroboration occurs across the B=C bond. The pi-manifold of the central BC(5)ring coordinates to chromium in an eta(6)fashion while only the B=C unit binds eta(2)to gold, indicating versatility of the 9-borataphenanthrene anion as a ligand. Supporting calculations rationalize the reactivity and aromaticity is corroborated by nucleus-independent chemical shift (NICS) indices.
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关键词
borataalkene,boratabenzene,boron,heterocycles,hydroboration
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