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![[(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
Photoredox Catalysis by Phosphorus(V)-Corrole: α-Functionalization of Aldehydes in both Batch and Continuous Flow
Ashmita Jain1, Pooja Chahal2, T J Dhilip Kumar2
1Department of Chemistry, Indian Institute of Technology Gandhinagar, Gandhinagar382355, Gujarat, India.
Abstract:
A2B-type P(V)-corroles were synthesized with push-pull meso-aryl substituents to examine their photocatalytic application for C-C bond formation in both batch and flow conditions. The developed protocol requires only 0.25 mol % catalyst to synthesize β-formyl esters in high yields (up to 90%). Remarkably, the reaction time decreased from 5 h to 20 min after moving from a batch to a flow reactor. The P(V)-corroles exhibited excellent fluorescence quantum yields (43-53%), and their singlet-state lifetime was ∼3 ns, making them ideal photocatalysts to take part in the energy transfer process with the substrates. The photophysical and mechanistic insights revealed that P(V)-corrole interacts with substrates via both energy- and single-electron-transfer (SET) pathways. Computational studies of the reaction mechanism suggested that SET occurs via the singlet state of the phosphorus corrole.
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