THE SYNTHESIS AND CHARACTERIZATION OF SOME POROUS CROSS—LINKED POLY （VINYLACETOPHENONE） RESINS AND THEIR CAPACITIES IN ADSORBING GYPENOSIDES

In search of a suitable adsorbent used for the enrichment and separation of natural saponins from an aqueous solution,a series of porous cross-linked poly (vinylaceto-phenone) resins I-Ⅸ were synthesized via the Friedel-Crafts acylation of styrene-divinyl-benzene copolymer beads.Their carbonyl contents were characterized by infrared spectra and elemental analysis.Their physical properties such as bulk densities,skeleton densities,and specific surface areas were also determined.The tests for the resins adsorption of gypenosides showed that only those resins with high carbonyl contents and large specific surface areas could favorably adsorb gypenosides from an aqueous solution with much higher capacities.     

毛细管气相色谱法测定染发剂中七种染料组份

采用毛细管气相色谱法对染发剂中苯酚、邻苯二酚、对苯二酚、间苯二酚、邻苯二胺、对苯二胺和间苯二胺七种染料进行了分析。结果表明，该方法能有效地分离这七种染料，其检出限为苯酚50ng、邻苯二胺160ng、对苯二胺240ng、邻苯二酚280ng、间苯二胺180ng、对苯二酚190ng、间苯二酚180ng。方法测定精密度为2.07-4.33％，回收率为96.1％-103.3％。方法具有操作准确、简单、快速、实用等特点。     

苯甲酰苯胺激发态质子转移反应的理论研究 II: N-苯基苯甲酰胺和N-苯基苯甲亚胺酸的互变异构

用INDO系列方法对苯甲酰苯胺激发态质子转移反应进行了理论研究, 求得了基态和激发态反应的位能面、势垒过渡态和荧光位移。对整个反应的机理和应用前景进行了探讨, 有关化合物的光谱与实验结果较好地符合。     

含锆层柱蒙脱石对1,2,4三甲基苯歧化反应的催化作用

用离子共聚法合成了硅锆层柱蒙脱石（ＳｉＺｒＰＩＬＭ）和铁锆层柱蒙脱石（ＦｅＺｒＰＩＬＭ），考察了它们对１，２，４三甲基苯（１，２，４ＴｒＭＢ）歧化反应的催化性能．１，２，４ＴｒＭＢ在催化剂样品上可发生歧化反应和异构化反应，歧化反应选择性达８０％以上．随着催化剂预处理温度的提高，１，２，４ＴｒＭＢ转化率下降，歧化反应选择性和四甲基苯（ＴｅＭＢ）中１，２，４，５ＴｅＭＢ含量则升高．催化剂对１，２，４ＴｒＭＢ歧化反应有择形催化作用，１，２，４，５ＴｅＭＢ和间二甲苯、邻二甲苯为主要产物，并且其含量偏离其热力学平衡组成，ＴｅＭＢ中１，２，４，５ＴｅＭＢ的含量在８５％以上．     

Synthesis and Crystal Structure of N-（1-Phenyl-3-methyl-4-benzal-pyrazolone-5）-furoic Hydrazide

1 INTRODUCTION In recent years, investigations on the com- pounds containing hydrazide or hydrazone moieties have been increased considerably because of their potentially biological activities, especially as poten- tial inhibitors for many enzymes[1～5]. The presence of weak molecular interactions such as hydrogen- bonding controls the conformational and structural features which are important to the drug action[6, 7]. We have synthesized the photochromic compounds of pyrazolone thiosemi…     

分子内环加成的甾体全合成

近年来,分子内环加成反应已广泛用于甾体化合物全合成,其主要一步是由取代的苯并环丁烯热裂而成的5,6-二亚甲基-1,3-环己二烯发生区域专一和立体选择性的环加成反应,构成甾体骨架。现在用此法已合成了一系列消旋和光学活性的甾体化合物。     

钯催化α-炔醇立体专一合成α-（Z）-氯亚甲基-β-内酯

首次在一氧化碳存在下，以仲丁醇和苯为混合反应溶剂，氯化钯和氯化铜为催 化体系催化α-炔醇羰基化，立体专一合成α-（Z）-氯亚甲基-β-内酯环。     

2-（2＇-羟基-3’-甲氧基苯基）-5，6-二硝基苯并咪唑的阴离子识别

设计并合成了2-（2’-羟基-3’-甲氧基苯基）-5，6-二硝基苯并咪唑化合物（1），通过X射线单晶衍射研究了该化合物的固态结构．利用紫外-可见光谱技术研究了其对阴离子的识别，发现化合物1能够在DMSO中对AcO^-，H2PO4^-，OH^-的3种离子进行有效识别，同时溶液由原来的黄色变成红色，实现裸眼检测．