Synthesis of novel boron chelate complexes and proposed mechanism of new rearrangement

• A series of novel boron azo chelate complexes were synthesized.
• A new rearrangement mechanism was proposed.
• The structure was characterized by single crystal X-ray analysis.

We synthesized novel boron chelate complexes by the reaction of pyrazoline derivatives and boron trifluoride diethyl etherate followed by a new rearrangement. The structures of the compounds were characterized by IR, NMR and HRMS, especially, a typical compound 3c was confirmed by X-ray single crystal analysis. We proposed a mechanism of the rearrangement. Moreover, the absorption and fluorescence spectroscopy of these compounds were measured.

A series of boron chelate complexes were synthesized and a mechanism of the rearrangement was proposed.Figure optionsDownload as PowerPoint slide