Crystal Structure of 2-[(P,P-Diphenoxy)phosphono(p-methyl)benzyl]-1, 2-benzisoselenazol-3(2H)-one

The crystal structure of the title compound 2-[(P, P-Diphenoxy)phosphono(p-methyl)benzyl]-1, 2-benzisoselenazol-3(2H)-one, C27H22NO4PSe, was determined by single crystal X-ray diffraction. It crystallizes in the triclinic system, space group P(No. 2) with Mr=534.41, a=9.761(2), b=10.304(2), c=13.396(3), α=110.97(3), β=107.70(3). γ=90.02(3)°, V=1190(1) 3, Z=2, Dx=1.492 g/cm3, λ=0.71073, μ=1.6596 mm-1 and F(000)=544. The structure was solved by direct methods. The final R factor is 0.068 and Rw is 0.074 for 2500 unique observed reflections [I≥3σ(I)]. The results presented herein indicate that the selenium-containing bicyclic moiety is a coplanar structure and that two adjacent molecules are symmetrically linked to each other forming a dimer through the Se(1c)...O=P(1) bonding interaction with an intermolecular Se(1c)...O distance of 2.797 .     

荧光法研究硒酶模型化合物消除.OH自由基的作用

利用Ｆｅｎｔｏｎ反应产生的羟基自由基与苯甲酸生成具有荧光的羟化苯甲酸，用荧光法间接测定羟基自由基的含量．用荧光法研究新合成的５种硒酶模型化合物对羟基自由基的清除作用．结果表明，新合成的硒酶模型化合物对羟基自由基有良好的清除作用．该法具有简便、快速、灵敏等特点．     

Synthesis,Structure and Antitumor Activity of S~*-2-〔2-(Ethyl 4-Methylvalerate〕-1,2-Benzisoselenazol-3(2H)-one

1mrnODUCnONBenzisoselenazolones(BISAs)representanewclassofanti--inflammatoryagentasanexampleofseleno-organiccompoundsintherapyofoxidativestresslinkedpathologicalconditions(li.Amongthem,ebselen(2--phenyl--1,2--benzisoselenazol-3(2H)--one,PZ51)hasbeenacceptedasthebestmimicOfGSH-Px(Zi.InadditiontoitsGSH--Px-likeactivityt'nvdro,ithasbeenreportedthatebselencaninhibit5liPOxygenaseandNOsynthase"',isomeriseLTB.toabiologicallyinactiveisomer[41andinhibitthemigrationofPMNLandSPLTintotheinf…     

双苯并异硒唑酮及其类似物的合成与表征

以Ebselen为先导化合物,合成了7种双苯并异硒唑酮结构的新型Ebselen类似物,其结构经^1H NMR,IR和MS表征。     

2-(2-取代-1,3,4-噻二唑-5-基)-苯并异硒唑-3(2H)-酮衍生物的合成及体外抗癌活性

根据活性基团拼合原理, 用2-氯硒基苯甲酰氯和2-氨基-5取代-1,3,4-噻二唑缩合合成了10个新的2-(2-取代- 1,3,4-噻二唑-5-基)-苯并异硒唑-3(2H)-酮衍生物(6), 并通过IR, ¹H NMR, ESI-MS和元素分析对其结构进行了确认, 采用CCK-8法测试了化合物抑制肿瘤细胞增殖活性. 结果表明, 化合物6h对人体肺癌细胞A-549, 化合物6a, 6b, 6d, 6e, 6f, 6g, 6h, 6j对人体乳腺癌细胞MCF-7, 化合物6a, 6b, 6d, 6e, 6f, 6g对人体肝癌细胞SSMC-7721抑制活性均强于阳性对照药依布硒啉, 且表现出一定的选择性, 具有进一步研究的潜在价值.     

苯并异硒唑酮氨基酸衍生物的谷胱甘肽过氧化物酶样活性

采用ＮＡＤＰＨ／ＧＳＳＧ还原酶为指示剂的偶合法测定了两类共７种新型苯并异硒唑酮氨基酸衍生物的ＧＳＨ－Ｐｘ活性．结果表明，所有模拟物均显示较好的ＧＳＨ－Ｐｘ样活性，并且具有明显的构－效关系．     

Crystal Structure of 2-〔(P,P-Diphenoxy)phosphono(p-methyl)benzyl〕-1,2-benzisoselenazol-3(2H)-one

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