Synthesis of Cyclic Selenenate/Seleninate Esters Stabilized by ortho-Nitro Coordination: Their Glutathione Peroxidase-Like Activities
作者:Vijay P. Singh、Harkesh B. Singh、Ray J. Butcher
DOI:10.1002/asia.201000858
日期:2011.6.6
esters and related derivatives by aromatic nucleophilic substitution (SNAr) reactions of 2‐bromo‐3‐nitrobenzylalcohol (13) and 2‐bromo‐3‐nitrobenzaldehyde (17) with Na2Se2/nBuSeNa are described. The reaction of 13 with Na2Se2 at room temperature afforded 7‐nitro‐1,2‐benzisoselenole(3 H) (15) instead of the desired diaryl diselenide 14. Oxidation of selenenate ester 15 with hydrogen peroxide afforded
Na 2 Se 2 / n BuSeNa的2-溴-3-硝基硝基苯甲醇(13)和2-溴3-硝基硝基苯甲醛(17)的芳香亲核取代(S N Ar)反应合成硒酸酯/硒酸酯和相关衍生物被描述。的反应13用Na 2硒2在室温下,得到7-硝基-1,2- benzisoselenole(3 H)(15代替)的所需碳酸二芳基联硒化物14。用过氧化氢氧化硒酸酯15得到相应的硒(IV)衍生物7-硝基-1,2-苯并亚硒酚(3 H)氧化硒(18)。通过用原位生成的n BuSeNa处理化合物17合成了2-(丁基硒基)-3-硝基苯甲醛(19)。硒化物19的溴化反应没有提供预期的芳基硒烯溴化物20,相反,它导致了意外的7-硝基-1,2-苯并亚硒酚(3 H)-3-醇(21)和3,3'的形成氧双(7-硝基-1,2-苯并亚硒酮(3 H))(22)。根据硒烯基溴化物20中的芳环应变,合理地形成了杂环21和22。分子内次级Se⋅⋅