Our approach to the generation of new organocycloborates involves an unprecedented boron-centered cyclisation reaction of ω-bromoalkyl(diorgano)boranes occurring via Grignard reagents.[1] This synthetic method permits to increase the size of the heterocycle and vary the class of organoborate, by simply modifying the alkyl chain length of the α,ω-bromoalkene or the dialkylborane precursor, respectively. |
Synthesis of Cycloborates |
Novel Spiroborates |
Fig. 1: Molecular structures of novel spiroborates (Cations are omitted for clarity.) |
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