一种新的测量单线态氧的化学发光体系

通过试验,建立了以磺化铝酞菁(Alpcs)-海萤萤光素类似物(CLA)经He-Ne激光照射产生并可检测单线态氧的化学发光体系,该体系灵敏、简便、快速、实用.     

Furoguaiacin及其类似物的全合成

Ｆｕｒｏｇｕａｉａｃｉｎ及其类似物的全合成＊吴安心王明义潘鑫复＊＊（兰州大学化学系应用有机化学国家重点实验室兰州７３００００）李天锡金文（兰州医学院学药学系兰州７３００００）关键词Ｆｕｒｏｇｕａｉａｃｉｎ全合成类似物木脂素中图分类号Ｏ６２６．１１呋喃...     

催化抗体及其在化学中的应用

对一类新的有机反应催化剂——催化抗体作了介绍．它能提高速率１０３～１０６倍．许多有机反应，甚至那些在一般条件下很难发生的反应都能被特定的抗体所催化，并可进行克量级合成     

3-羟基-4-氨基丁酸及其类似物的合成进展

3-羟基-4-氨基丁酸（简称GABOB）是一类有趣的氨基酸，它的一些类似物如Statine等存在于一些具有抗肿瘤、抗病毒、抗炎症等生理活性的天然产物之中。从治疗的角度讲，3-羟基-4-氨基丁酸也具有重要意义。本文简要介绍GABOB类似物的天然存在及生理活性，并从不同的起始原料出发介绍它们的立体选择性合成。     

{[Gd(DMF)3(DMSO)(H2O)3](μ-CN)[Fe(CN)5]}·2H2O的合成，结构表征和磁性

A new cyano-bridged Gadolinium^Ⅲ-Iron^Ⅲ complex {[Gd(DMF)₃(DMSO)(H₂O)₃](μ-CN)[Fe(CN)₅]}·2H₂O (DMF=N,N-dimethylformamide; DMSO=dimethylsulfoxide) was synthesized by the grinding reaction method. It crysta-llizes in the triclinic, space group P1 with cell parameters: a=0.90363(2) nm, b=1.250 78(3) nm, c=1.41303(1) nm, α=93.174(1)°, β=94.406(1)°, γ=91.817(2)°, and V=1.588 87(5) nm³, D_c=1.582 g·cm^-3, Z=2, M_r=756.72, F(000)=760, μ=2.645 mm^-1. The slightly distorted square-antiprism eightfold-coordinated Gd(Ⅲ) and the approxi-mately oriented octahedrally sixfold-coordinated Fe(Ⅲ) are linked by a cyano-bridge group to construct a dinuclear compound. The {[Gd(DMF)₃(DMSO)(H₂O)₃](μ-CN)[Fe(CN)₅]} species are held together via hydrogen bonds to form a three-dimensional framework. The Gd(Ⅲ)-Fe(Ⅲ) interaction is antiferromagnetic. CCDC: 223430.     

低浓度CTAB对血红蛋白与阿昔洛韦间相互作用与性质的影响

The effects of cetyltrimethylammonium bromide （CTAB） on the properties of hemoglobin （Hb） at low CTAB concentration were studied in Hb/acyclovir/CTAB system by the methods of UV-Vis spectrum, fluorescence, zeta potential, conductivity and negative-staining transmission electron microscope （TEM）. With the increase of CTAB concentration, the UV peak intensity at 276 nm, the intrinsic fluorescence, the zeta potential of Hb and the system conductivity were all enhanced. Hb was easily oxidized to oxyHb and hemichrome. In Hb/acyclovir/CTAB system, CTAB made the UV-Vis spectrum, fluorescence, conductivity and conformation of Hb tend to be returned to those of the original Hb but the zeta potential not to do so. The UV absorption peak of Hb-acyclovir complex disappeared and the tight structure of Hb aroused by acyclovir was refolded. When CTAB concentration was higher than 5 × 10 ^5 mol/L, the two absorption peaks at 536 and 576 nm appeared again, and the Hb structure became looser again.     

咖啡因及其9种类似物的胶束电动毛细管分析研究

 以十二烷基硫酸钠 (SDS)胶束为准固定相 ,考察了咖啡因及其 9种类似物在胶束电动毛细管 (MECC)分离模式下的分离行为。研究了运行缓冲液的 pH值、磷酸盐浓度、SDS浓度、甲醇体积分数、分离电压、分离温度等因素对这 10种化合物的迁移时间和分离效果的影响。结果发现 ,这些因素对上述 10种化合物的分离有显著的影响 ,尤以pH值为最。它不仅影响化合物的迁移时间和分离效率 ,还改变其出峰顺序 ,这与碱性条件下化合物仲胺基上氢的电离有关。优化后的分离条件 :运行缓冲液为 2 0mmol/L磷酸盐 2 0mmol/LSDS(pH 11 0 ) ,分离电压为2 5kV。     

抗癌活性天然产物Cryptophycins的研究进展

总结了具有强抗癌活性的天然产物cryptophycins及其结构类似物的研究进展, 内容包括cryptophycin的合成、 活性-结构关系规律以及结构类似物的研究情况.     

Studies on the Synthesis of a Natural Product—Piceatannol and its Analogs

Piceatannol,(E)-3,3′,4,5′-tetrahydroxy stilbene, a natural polyhydroxy stibene, possesses many biological activities, its synthesis has been reported. We designed another route of its synthesis, which can be controlled more easily. The synthetic product was characterized by elemental analysis,IR,MS and ^1H-NMR. Its analogs were synthesized by the similar method.