Borane-functionalized heteroscorpionate copper complexes as catalysts for azide-alkyne cycloaddition.

ABSTRACT: In this work, new copper(I) complexes of borane-functionalized bis(3,5-dimethylpyrazolyl)methane ligands were synthesized, characterized and used as catalysts for the cycloaddition of phenylacetylene and azides. Reaction of the allylated bis(3,5-dimethylpyrazolyl)methane proligand (La) with CuCl or [Cu(NCMe)₄]BF₄ gave rise to the neutral copper chloride complex [(La)CuCl] (1a) or the binuclear cationic copper complex [(La)Cu(NCMe)]2(BF4)2 (2a2), respectively. The same reactions using a borane-functionalized bis(3,5-dimethylpyrazolyl)methane proligand (Lb) led to the isolation of complexes [(Lb)CuCl] (1b) and [(Lb)Cu(NCMe)2]BF4 (2b). The new complexes were characterized by NMR and FTIR spectroscopies, elemental analysis, cyclic voltammetry and, in selected cases, singl

SUBMITTER: Cruz TFC 

PROVIDER: S-EPMC12394796 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature