No abstract

No abstract

No abstract

No abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/pssb.202100600.

No abstract

Furan derivatives Furan derivatives R 0060Multicomponent Reactions Involving Zwitterionic Intermediates for the Construction of Heterocyclic Systems: One-Pot Synthesis of Aminofurans and Iminolactones. -The in situ generated 1:1 zwitterionic intermediate from dimethyl acetylenedicarboxylate (II) and cyclohexyl isocyanide (III) is trapped with a third component to constitute a novel multicomponent reaction. The reaction of stoichiometric amounts of (II), (III) and aldehydes (I) provides aminofurans (IV), whereas the reaction between (II), (III) and quinones (V), (VII), and (IX) furnishes the corresponding iminolactones. Further iminolactones are synthesized by reaction of (II) and (III) with benzil, N-methylisatin, and 4-nitroacetophenone. -(NAIR*, V.; VINOD, A. U.; ABHILASH, N.; MENON, R. S.; SANTHI, V.; VARMA, R. L.; VIJI, S.; MATHEW, S.; SRINIVAS, R.; Tetrahedron 59 (2003)

Densities of pure distilled water, tetra butyl ammonium bromide glycerol{[TBAB][Gly]}, and different concentration of aqueous bisphenol A (aq. BPA) (i.e., 25, 50, 75, and 100 ppm) were measured at different temperatures from 293.15–343.15 K. Further, densities of the pseudo binary mixtures of aq. BPA and {[TBAB][Gly]} over the entire mole fraction were measured at different temperatures from 293.15–343.15 K. From these measured density data, the solution thermodynamic properties of the pseudo binary mixtures of aq. BPA and {[TBAB][Gly]} were calculated, and the excess molar volume data were correlated using the Redlich–Kister polynomial equation. Furthermore, the σ‐profiles and σ‐potentials of all the studied species were generated and analyzied in terms of H‐bond donor and/or acceptor at atom and molecular levels. Finally, based on the results of aq. BPA with {[TBAB][Gly]}, tetra butyl ammonium bromide decanoic acid {[TBAB][DA]} and tetra butyl ammonium bromide oleic acid {[TBAB][OA]} based deep eutectic solvents were used for the removal of BPA from the aqueous stream at 298.15 K and 1 atm. This process was characterized in terms of distribution coefficient (D), extraction efficiency (η), and also thermodynamic feasibility of the process at different temperatures.