Novel Water-Soluble Diorganyl Tellurides with Thiol Peroxidase and Antioxidant Activity
作者:Takahiro Kanda、Lars Engman、Ian A. Cotgreave、Garth Powis
DOI:10.1021/jo990842k
日期:1999.10.1
at pH = 7.4 by using the coupled GSSG reductase assay. Dialkyl telluride 10 turned out to be the most efficient catalyst. Several alkyl aryl tellurides 8 were also more efficient than any of the previously tested organotellurium compounds in this model. Bulky and electron-withdrawing aryl substituents seemed to reduce activity, whereas electron-donating groups enhanced it. Alkyl aryl selenide 9 was
制备了具有磺丙基的新型水溶性二芳基碲化物,烷基芳基碲化物和二烷基碲化物,发现它们具有有效的过氧化物分解和断链抗氧化能力。将双(4-羟苯基)碲化物(4)的二锂,二钠,二钾和双-四甲基铵盐在叔丁醇水溶液中用2.3当量的1,3-丙磺酸内酯处理,得到相应的双-O盐5 -磺丙基丙基二芳基碲化物。用硼氢化钠在乙醇中还原各种二芳基二碲化物。将丙磺酸内酯加到所得的硬脂酸神经酸钠中后,沉淀出相应的3-芳基碲基丙烯基丙烷磺酸钠盐8。二苯基二硒化物和二丁基二碲化物类似地反应,分别得到3-苯硒烯基丙烷磺酸(9)和4-碲辛烷磺酸(10)的钠盐。使用耦合的GSSG还原酶测定法在pH = 7.4时评估了水溶性化合物的谷胱甘肽过氧化物酶样活性。事实证明,二烷基碲化物10是最有效的催化剂。在该模型中,几种烷基芳基碲化物8也比任何先前测试过的有机碲化合物更有效。庞大的和吸电子的芳基取代基似乎降低了活性,而给电子基团则增强了活