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Updated: Aug 28, 2026
![[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2FCDNSource%2Fteasers%2F59739.jpg&w=3840&q=50)
[(DPEPhos)(bcp)Cu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
Published on: May 21, 2019
Demonstrating the Chemoselective Lewis Acid Activity of Pyridine(Diimine) Bismuth Cations
Anthony M Alfaro1, Valerie A Schmidt1
1Department of Chemistry, University of California San Diego, La Jolla, California 92093, United States.
Abstract:
Herein, we describe the preparation of a library of cationic bismuth-(III) pyridine-(diimine) compounds and the assessment of their Lewis acidity measured by their interaction with phosphine oxides, acid halides, and ketones. These bismuth compounds have acceptor number values ranging between that of BiCl3 and AlCl3, however, their catalytic activity for the formation of C-C bonds is distinct from these simple salts. Our studies suggest that Friedel-Crafts-type arene acylation is promoted via acid halide coordination in the presence of similar ketone donors. This work demonstrates that bismuth-(III) pyridine-(diimine) cations serve as selective Lewis acids to achieve C-C bond formation.
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