The preparation of
nitriles from primary amides or aldoximes was
achieved by using oxalyl chloride with a catalytic amount of dimethyl
sulfoxide in the presence of Et3N. The reactions were complete
within 1 h after addition at room temperature. A diverse range of
cyano compounds were obtained in good to excellent yields, including
aromatic, heteroaromatic, cyclic, and acyclic aliphatic species.
Chemical conversion of carbon dioxide (CO2) into value‐added chemicals, for example, ethanol, has been recognized to be one of the most effective ways of carbon sources cycling. However, the selectivity controlling of CO2 reduction is still a challenging problem due to the formation of a variety of products, such as methanol, methane, formic acid, and carbon monoxide, associating with complicated reaction mechanisms. Herein, a simple and effective theoretical analysis of “reaction phases diagram” to understand the selectivity of CO2 reduction, based on the principle of reaction free energies with sequential priority is proposed. Using this principle, the fundamental understanding of the formation of different products in CO2 reduction is rationalized. On the basis of reaction free energies’ analysis, the selectivity trends of CO2 reduction to methane, methanol, and ethanol from a number of experiments are discussed. At the end, the selectivity trends with a computer algorithm of searching full reaction pathways, explaining well the effects from catalyst sizes, substrate observed in experiments, are confirmed.
A nanoporous CuO/Cu composite material was prepared using a dealloy method, and exhibited excellent cycling stability when evaluated as an anode for lithium-ion batteries.
The pairing of DMSO and oxalyl bromide is reported as a highly efficient brominating reagent for various alkenes, alkynes and ketones. This bromination approach demonstrates remarkable advantages, such as mild conditions, low cost, short reaction times, provides excellent yields in most cases and represents a very attractive alternative for the preparation of dibromides and α-bromoketones.
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