Tetravalent Spiroselenurane Catalysts: Intramolecular Se···N Chalcogen Bond-Driven Catalytic Disproportionation of H<sub>2</sub>O<sub>2</sub> to H<sub>2</sub>O and O<sub>2</sub> and Activation of I<sub>2</sub> and NBS
作者:Monojit Batabyal、Aditya Upadhyay、Rahul Kadu、Nihal Chaitanya Birudukota、Deepak Chopra、Sangit Kumar
DOI:10.1021/acs.inorgchem.2c00651
日期:2022.6.13
spiroselenuranes have been explored as catalysts in synthetic oxidation iodolactonization and bromination of arenes. The synthesized spiroselenurane has activated I2 toward the iodolactonization of alkenoic acids under base-free conditions. Similarly, efficient chemo- and regioselective monobromination of various arenes with NBS catalyzed by chalcogen-bonded synthesized spiroselenuranes has been achieved
硫属元素键相互作用最近在合成化学、结构和键合领域引起了相当大的关注。在这里,通过氧化衍生自 8-氨基喹啉的相应双(2-苯甲酰胺) 硒化物,分离了三种有机螺硒脲,它们的 Se(IV) 中心具有强烈的分子内 Se···N 硫属元素键合相互作用配体。此外,合成的螺硒醚,在测定其抗氧化活性时,首次显示出过氧化氢歧化为 H 2 O 和 O 2 ,由1监测的任何有机硒分子对 H 2 O 2具有一级动力学。核磁共振氢谱。供电子 5-甲硫基苯甲酰胺环取代的螺硒醚以 15.6 ± 0.4 × 10 3 μM min –1的高速率歧化过氧化氢,速率常数为 8.57 ± 0.50 × 10 –3 s –1,而 5-甲氧基和未取代的苯甲酰胺螺硒脲以 7.9 ± 0.3 × 10 3和 2.9 ± 0.3 × 10 3 μM min –1的速率催化 H 2 O 2歧化,速率常数为 1.16 ± 0.02 × 10