Abstract
Abstract A cyclic (alkyl)(amino)bromoborane (CAABBr) was synthesized by a reaction of the corresponding hydroborane with bromine in the presence of triethylamine. Reduction of the resulting CAABBr with Li powder and 4,4′-di-tert-butylbiphenyl (DBB) generated a thermally labile cyclic (alkyl)(amino)boryllithium (CAABLi) which was characterized by NMR spectroscopy. Quenching of the mixture reduced by Li/DBB with methanol-d1 or MeOTf at low temperature gave a deuterioborane or methylborane, supporting the generation of CAABLi.
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