Electrochemical-mediated fixation of CO₂: three-component synthesis of carbamate compounds from CO₂, amines and N-alkenylsulfonamides

Abstract

An electrocatalyzed three-component cascade reaction of CO2, amines, and N-alkenylsulfonamides is developed, providing an environmentally friendly and efficient method of synthesizing a series of new carbamate compounds. This reaction meets...

Bio-Based Trivalent Phytate: A Novel Strategy for Enhancing Fire Performance of Rigid Polyurethane Foam Composites

“…8 showed that the temperature corresponding to the maximum release intensity of gaseous products for the composites was around 350°C. The peak values of gas-phase products were mainly distributed between 3550-3750, 2800-3050, 2250-2400, 1500-1800, 950-1200 and 650-750 cm −1 , which were in agreement with previous reports [31]. The FTIR spectra of the gaseous products of the composites at 350°C were shown in Fig.…”

“…It was even observed obvious collapse of cell structure in RPUF/PA-Al30. This may be because PA could promote the foaming process, the active −OH in PA reacted with -N=C=O group in polyisocyanate to generate carbamate, which further decomposed and released CO 2 , resulting in uneven forces in all directions during the growth of bubbles in the foaming process [31].…”

Multicomponent reactions and photo/electrochemistry join forces: atom economy meets energy efficiency

“…Substitution on 1and 2-positions did not significantly hamper the reaction and In 2021, Xiong et al designed a four-component reaction following a similar pathway involving double bond activation through the formation of an iodonium cyclic intermediate. 126 ortho-Amino styrene was the substrate of choice and ammonium iodide was selected as the iodide source via anodic oxidation. An in situ formed carbamate by the reaction between CO 2 and an amine acts as a nucleophile.…”

Electrochemically Enabled Cascade Cyclization Reaction of Aromatic Aldehydes and Pyrazol-5-amines: Synthesis of Bis-pyrazolo[3,4-b:4′,3′-e]pyridines

“…Electrochemical synthesis is recognized as an environmentally friendly way to construct various nitrogen-containing heterocycles under external chemical oxidant-free conditions . In this field, some impressive pioneering works have been made by Moeller, Xu, Zeng, Lei, Cheng, Pan, Zhang, and others . Continuing our interest in novel electrochemical methods for the synthesis of nitrogen-containing heterocycles, we herein report an electrochemical approach for the construction of bis-pyrazolo­[3,4- b :4′,3′- e ]­pyridines from readily available aromatic aldehydes and pyrazol-5-amines (Scheme c).…”