Substituted phenyl urea and thiourea silatranes: Synthesis, characterization and anion recognition properties by photophysical and theoretical studies

A Dual Approach on Experimental, Theoretical Insight of Structural Elucidation, Hirshfeld Surface Analysis, Optical and Electrochemical Properties of Acyl Thiourea-Ethynyl Hybrid Derivatives

“…The downfield of amide protons (NH-C = O), caused by intramolecular hydrogen bonding and an anisotropic effect between the N-H and the oxygen atom of the C = O. [31,32]. In fact, the occurrence of N-H resonances is the crucial part of the judgement and to prove the existence of thiourea motif.…”

Synthesis, In vitro Antibacterial and Antifungal Activities of Trifluoroalkyl-N, N’-Disubstituted Thioureas

“…The mixture was Heat at the least for 2 hours. After vacuum evaporation of the solvent, the crude product was filter and purified either by chromatography (petroleum ether/diethyl ether (8:2) or by recrystallize from hexane or petroleum ether to give the corresponding pure compounds (1)(2)(3)(4)(5)(6)(7)(8)(9). We should note that the compound 7 has already been prepared by another experimental protocol in an earlier work [47] and the compounds 1, 3 and 8 are commercially available.…”

“…The strong electrophilicity of the NCS group of isothiocyanates enables these heterocumulenes to undergo nucleophilic addition and cycloaddition reactions, making them extremely useful in the synthesis of thiocarbamoyl derivatives [7]. Particularly isothiocyanates have been used for the synthesis of thioureas of synthetic, biological, agricultural and pharmaceutical interest [8][9][10][11][12][13][14][15][16][17]. Recently, thioureas have attracted considerable attention for their potential use as binding units for artificial receptors in supramolecular chemistry because of their characteristic behavior based on Lewis acids and strong hydrogen-bond donors [18][19][20][21][22][23][24].…”

New atranes and similar ionic complexes. Synthesis, structure, properties

“…Functionalization of silatranes with different groups in exocyclic position is an important trend as the resulting compounds retain the activities of silatranes as well as substituted groups …”

“…For example, silatranes. Due to their unusual architecture (the N → Si bond, the pentacoordinated silicon atom, the tricyclic structure), high dipole moment and strong electron‐donating effect of the silatrane skeleton, silatranes are of interest not only as theoretical objects but also as important functional reagents, advanced materials (Si‐organic polyimide films, catalysts, optical probes, adhesion layers for nanoparticles), as well as physiologically and pharmacologically active compounds …”