Synthesis and DFT studies of novel aryloxymaleimides via nucleophilic substitution of tosyloxy group

Double metal synergistic synthetic urea: an electrocatalytic study

Urea was synthesized from CO2 and N2 electrocatalyzed by doping V and M on an –N–C substrate.

Electrochemical reduction of CO2 and N2 to synthesize urea on metal-nitrogen-doped carbon catalysts: a theoretical study

Fossil fuels have been increasingly consumed since the industrial revolution, causing rapid increases in carbon dioxide emissions and disrupting the global carbon cycle. With increasing attention being paid to the harmful effects of carbon dioxide as a "greenhouse gas", its use as a feedstock for basic chemical production is an attractive topic. Nature benefits humans through "crops brought by thunderstorms". Combining these two methods to produce urea containing nitrogen is the focus of this paper. In this paper, a series of catalysts supported on the substituted corrole substrates in the form of a double transition metal are investigated by DFT calculations. The best catalyst was selected and combined with carbon and nitrogen reduction to further explore the catalytic performance of urea synthesis. Based on this study, it was found that the synergistic catalytic strategy of double active sites had broad prospects in urea synthesis, and could also provide new development strategies for the design of other efficient molecular catalysts.

DFT calculation and NMR data of novel aryloxymaleimides and the intermediates and transition states in the reaction

Maleimide ring is an important scaffold in organic chemistry, and tosyloxy group is a functional group widely used in organic synthesis. Nevertheless, tosyloxymaleimide compounds have been rarely reported, and the reactivity properties and potential applications of tosyloxymaleimide in organic synthesis remain to be explored. This article presents the density functional theory (DFT) calculation data of the reaction mechanism of nucleophilic substitutions of tosyloxymaleimide with phenol, including the coordinate of all the stationary points (the reactant, transition states, intermediates, and product). All the structures had been geometrically optimized using M06-2X functional and 6-31+G** basis set; the reactant, intermediates and product had no imaginary frequencies, and each transition state has only one imaginary frequency in the vibration analysis at the same computation level. The intrinsic reaction coordinates (IRCs) of two steps of the reaction were calculated. ¹H and ¹³C NMR spectra of the novel aryloxymaleimide compounds synthesized using this nucleophilic substitution reaction (doi: 10.1016/j.molstruc.2019.04.020 Yan et al.,) were also presented in this article.