Synthesis of Known and Previously Inaccessible Poly(pyrazolyl)Borates under Mild Conditions.

J Org Chem

Departamento de Química Orgánica, Universidad de Valencia, Av. Vicente Andrés Estellés S/N. 46100 Burjassot, Valencia, Spain.

Published: July 2023

Poly(pyrazolyl)borate ligands have been obtained through the reaction of highly reactive haloboranes with in situ formed pyrazolides under very mild conditions. This versatile synthetic method allows the selective synthesis of bis-, tris-, or tetrakis(pyrazolyl)borates. Furthermore, the method is compatible with the use of functional groups on the heterocyclic moieties of the poly(pyrazolyl)borates that were not accessible to date. Strongly encumbered sodium and thallium(I) poly(pyrazolyl)borates with a reduced donating ability have been obtained for the first time.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10337037PMC
http://dx.doi.org/10.1021/acs.joc.3c00761DOI Listing

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