Hokkaido University · Chemical Engineering
Professor Hisanori Senboku's research lab specializes in electrochemical carbon dioxide fixation, focusing on the development of sustainable methods for converting CO₂ into valuable carboxylic acids and related compounds. The lab pioneers electrochemical carboxylation reactions using various organic substrates—such as alkenes, vinyl halides, α-aminosulfones, and benzal diacetates—under mild conditions with atmospheric CO₂. Key innovations include the generation of aryl radicals for cyclization and carboxylation, reductive C–S bond cleavage, and selective functionalization of fluorinated and non-fluorinated arenes. The work has strong applications in pharmaceutical synthesis, particularly for non-steroidal anti-inflammatory drugs (NSAIDs) and other bioactive molecules.
Figures are computed from collected data and may differ slightly.
Electrochemical dicarboxylation of phenyl-substituted alkenes in the presence of atmospheric pressure of carbon dioxide with a platinum plate cathode and a magnesium rod anode readily took place efficiently in a DMF solution containing 0.1 M Et4NClO4 to give the corresponding 1,2-dicarboxylic acids in high yields.
In the past three decades, we have focused on the fixation of carbon dioxide by electrochemical method with a carbon-carbon bond forming reaction to yield carboxylic acid, so-called electrochemical carboxylation. Vinyl bromides and triflates, difluoroethylbenzenes, polyfluoroarenes, benzal diacetates, phenyl-substituted alkenes and enamides, and α-aminosulfones were found to be effective as substrates for electrochemical carboxylation. Phenylacetic acids and phenylpropanoic acids including non-s
Facile synthesis of 2,3-dihydrobenzofuran-3-ylacetic acids and related analogues was successfully carried out by a novel electrochemical aryl radical generation and its 5-exo cyclization followed by a carboxylation sequence of 2-allyloxybromobenzenes by using methyl 4-tert-butylbenzoate as an electron-transfer mediator.
Electrochemical reduction of N-Boc-α-aminosulfones in DMF using an undivided cell equipped with a Pt plate cathode and an Mg rod anode under atmospheric pressure of bubbling carbon dioxide through the solution under constant current conditions resulted in a reductive C–S bond cleavage with elimination of benzenesulfinate ion generating the corresponding anion species followed by fixation of carbon dioxide to give the corresponding N-Boc-α-amino acids in moderate to good yields.
Electrochemical carboxylation of α,α-difluorotoluene derivatives resulted in an efficient fixation of carbon dioxide to give the corresponding α-fluorophenylacetic acids in good yields, and this reaction was successfully applied to the synthesis of α-fluorinated nonsteroidal anti-inflammatory drugs (NSAIDs).
Abstract Efficient synthesis of mandel acetate, 2‐acetoxy‐2‐phenylacetic acid, from benzaldehyde was successfully performed in two steps using electrochemical carboxylation of benzal diacetate as a key step. When benzal diacetate, readily prepared from benzaldehyde and acetic anhydride in one step, in DMF containing 0.1 M Bu 4 NBF 4 was electrolyzed in the presence of carbon dioxide using an undivided cell equipped with a platinum plate cathode and a magnesium rod anode under constant current co
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