Vol 60, No 12 (2024)

Carbon dioxide (CO₂) is a widespread, inexpensive, renewable source of C1 carbon and the main component of greenhouse gases, so studies on its efficient conversion into useful products, corresponding to the principles of sustainable development, have received considerable attention in recent years. Electrochemical organic synthesis, as an environmentally friendly, mild and selective synthetic method, is considered an ideal approach to the CO₂ utilization and its use as a reagent. This review summarizes recent advances in the field of electrocarboxylation involving CO₂ as a precursor in reactions of various types, which reveal the great potential of these transformations in the synthesis of “green” organics, with special attention paid to processes at the late-stage of functionalization of complex molecules, promising in pharmaceutical chemistry.

This work reports the synthesis of a new compound 3 as a result of the reaction (2E)-1-(4-bromophenyl)-3-[5-bromo-2-(prop-2-en-1-yloxy)phenyl]prop-2-en-1-one with guanidine in the presence of hydrogen peroxide. The structure of the resulting product was confirmed by NMR spectroscopy and X-ray diffraction. A probable reaction mechanism is presented.

By the interaction of bis-(2-chloroethyl)hexane-1,6-diyldicarbamate with potassium salts of m- and p-aminobenzoic acids, new bis{2-[3(4)-aminophenylcarbonyloxy]ethyl} were obtained hexane-1.6-diyldicarbamates. It was found that they react with maleic anhydride in a molar ratio of 1 : 2 to form the corresponding bis-maleamides, by cyclization of which bis were obtained in an acidic medium-[2-(3(4)-(2,5-dihydro-2,5-dioxo-1H-pyrrol-1-yl)phenylcarbonyloxy)ethyl]hexane-1,6-diyldicarbamates. The physical and spectral properties of synthesized bismaleinimides have been studied.