A base-free copper-assisted synthesis of C₂-symmetric spirotelluranes and biaryls based on divergent stoichiometry of Na₂Te

Abstract

A one pot Cu(I)-assisted synthetic methodology has been developed for the preparation of biologically important C2-symmetric spirodiaza, benzyloxy, benzoxytelluranes from 2-bromo-N-aryl benzamides, benzyl alcohols, and benzoic acid by using tellurium...

Engineering Te‐Containing Recognition Modules for Chalcogen Bonding: Towards Supramolecular Polymeric Materials

“…Products 11 and 10 bis were crystallized by slow evaporation of a CH 2 Cl 2 /AcOEt solution. Similar to what shown in the literature, [44, 45] the crystal structure of spiro derivative 11 depicts two bicyclic moieties being almost completely perpendicular to each other and connected through the Te‐atom forming a heterocyclic spiro product ( Figure 3 ,a ). By calculating the Electrostatic Surface Potential (ESP) map of 11 , two σ ‐holes having similar values are depicted on the Te(IV) atom ( Figure 3 ,b ).…”

Bidentate Ligand Driven Intramolecularly Te…O Bonded Organotellurium Cations from Synthesis, Stability to Catalysis

“…Synthesis of 2‐ N ‐(quinolin‐8‐yl)benzamide phenyl tellurides : In an oven‐dried 10 mL round bottom flask, 2‐iodo‐2‐ N ‐(quinolin‐8‐yl)benzamide [10a] (374 mg, 1.0 equiv, 1.0 mmol) was taken with diaryl ditelluride (213 mg, 0.52 equiv, 0.52 mmol), CuI (19 mg, 0.1 equiv, 0.1 mmol) and Mg (49 mg, 2.0 equiv, 2.0 mmol) in 5.0 mL of DMF under argon atmosphere at room temperature for 1 h. The progress of the reaction is monitored by TLC. After completion of the reaction, the reaction mixture was poured into the brine solution, then extracted with ethyl acetate (100 mL×3) and washed with water 100 mL x 3.…”

Resin-supported cyclic telluride as a heterogeneous promoter of disulfide formation under solid–liquid biphasic conditions

“…15 On the other hand, a few compounds with tellurium, another chalcogen but a higher-period element, as a redox active center have also been reported as GPx mimics. 16 Recently, our group reported that a water-soluble telluride, ( S )-tetrahydrotellurophen-3-amine ( 4 ), and its organic solvent-soluble derivative ( 5 ) significantly promoted the oxidation of RSH by peroxides to RSSR through a GPx-like catalytic cycle (Fig. 2A).…”