An efficient method to synthesize N/O, O-difluoroboron complexes from alkynes

Abstract

A highly efficient redox- and step-economic method to synthesize N,O- and O,O-difluoroboron complexes from alkynes under aqueous condition with HBF4 as BF2 source has been developed. This strategy features good yields, broad substrate scope, mild reaction conditions, readily available starting materials and gram-scale synthesis. Significantly, these difluoroboron complexes present good fluorescence properties, indicating their potential applications in luminescent materials.

Keywords

• N,O-Difluoroboron complexes
• O,O-Difluoroboron complexes
• Fluorescence
• Luminescent materials