Solvent-assisted Carboxylation of Alkali Metal Phenoxide with Carbon Dioxide

Adsorption of Carbon Dioxide on Alkali Metal Exchanged Zeolites

Base-mediated carboxylation of unprotected indole derivatives with carbon dioxide.

A simple and straightforward method for the preparation of indole-3-carboxylic acids was discovered through the direct carboxylation of indoles with atmospheric pressure of carbon dioxide (CO(2)) under basic conditions. The key for the reaction was found to be the use of a large excess of LiO(t)Bu as a base to suppress the undesired decarboxylation side reaction.

Cobalt-catalyzed carboxylation of propargyl acetates with carbon dioxide.

The cobalt-catalyzed carboxylation of propargyl acetates with CO2 (1 atm) is described. The reaction proceeds at room temperature in the presence of Mn powder as a reducing reagent. Various propargyl acetates are converted to the corresponding carboxylic acids in good to high yields.

Palladium-catalyzed direct carboxylation of aryl bromides with carbon dioxide.

A novel protocol for the direct carbon dioxide insertion (CO(2)) into aryl halides in a catalytic manner is presented herein. Unlike other carboxylation methods using CO(2), there is no need for the synthesis of the corresponding organometallic intermediates. Additionally, and in contrast to the well-established carbonylation processes, our protocol does not use highly toxic CO for the preparat...

Promoter Effects of Alkali Metal Cations on the Electrochemical Reduction of Carbon Dioxide.

The electrochemical reduction of CO2 is known to be influenced by the identity of the alkali metal cation in the electrolyte; however, a satisfactory explanation for this phenomenon has not been developed. Here we present the results of experimental and theoretical studies aimed at elucidating the effects of electrolyte cation size on the intrinsic activity and selectivity of metal catalysts fo...