CO2 activation by electrogenerated divalent samarium for aryl halide carboxylation
Sakna Bazzi1, Gaëtan Le Duc, Emmanuelle Schulz
1Institut de Chimie Moléculaire et des Matériaux d'Orsay (UMR 8182), Equipe Catalyse Moléculaire Univ. Paris Sud, CNRS, Université Paris-Saclay 115, rue Georges Clémenceau, 91405 Orsay, Cedex, France. mohamed.mellah@u-psud.fr.
This study introduces a novel method for synthesizing benzoic acids from aryl halides using samarium electrodes for carbon dioxide activation. The process efficiently reduces CO2 via a samarium(II) complex, enabling carboxylation.
Area of Science:
- Organic Chemistry
- Electrochemistry
- Green Chemistry
Background:
- Aryl halides are common precursors in organic synthesis.
- Carbon dioxide activation remains a challenge in sustainable chemistry.
- Reductive carboxylation offers a pathway to valuable carboxylic acid products.
Purpose of the Study:
- To develop an efficient method for reductive carboxylation of aryl halides.
- To explore the use of samarium as a sacrificial anode in electrocarboxylation.
- To investigate the mechanism of CO2 reduction mediated by samarium complexes.
Main Methods:
- Electrochemical reductive carboxylation of aryl halides.
- Utilizing a samarium electrode as a sacrificial anode.
- Characterization of reaction intermediates and products.
Main Results:
- Successful synthesis of benzoic acids from aryl halides.
- Demonstration of efficient CO2 activation and reduction by electrogenerated Sm(II).
- Identification of a Sm(II)-complex as a key reductive reagent.
Conclusions:
- Samarium-mediated electroreductive carboxylation is a viable strategy for benzoic acid synthesis.
- This method provides a smooth and efficient approach to CO2 activation.
- The study highlights the potential of samarium in electroorganic synthesis.
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