EuI2—KI二元系相图

用差热分析和Ｘ射线衍射的方法研究了ＥｕＩ２－ＫＩ二元体系在３＊１０＾－４Ｐａ压强下的低压相图。实测相图显示，该二元体系存在一个同份熔化化合物ＫＥｕ２Ｉ５和一个异份熔化化合物Ｋ４ＥｕＩ６，两个在相共晶点的温度和成分分别为７３７Ｋ，２０％ＫＩ和７１３Ｋ，６０％ＫＩ。Ｘ射线粉末衍射的结果表明，ＫＥｕ２Ｉ５的晶体结构参数与文献数据十分吻合。本文还讨论了实测相图的误差来源，并由相图计算出ＥｕＩ２的熔化热为２１０１２Ｊ．ｍｏｌ＾－１。     

3—芳基—5—巯基—1,2,4—均三唑的双—Mannich反应研究

研究了在氯化氢－乙醇溶液中，３－芳基－５－巯基－１，２，４－均三唑与甲醛和伯胺（芳胺或脂肪胺）的双Ｍａｎｎｉｃｈ反应，合成了１３的的稠杂环化合物３，５－二取代０四氢均三唑并「３，４－ｂ」「１，３，５」噻二嗪，经元素分析、Ｉ手ＭＳ确定了结构，初步测定了该类化合物的生物活性。     

IO^—3—I^——结晶紫—阿拉伯胶体系分光光度法测定生笺样品中的磺

在硫酸介质中，在过量磺化钾及阿拉的伯胶存在下，ＩＯ＾－３氧化Ｉ＾－生成Ｉ＾－３，Ｉ＾－ｄ３再与结晶紫形成离子缔合物，缔物的最大吸民上波长为５５２ｎｍ，表观摩尔吸光系数ε５５２＝５，３８＊ｄ１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，ＩＯ＾３－量在０－１２μｇ／２５ｍＬ内服比耳定律。用于生物样品中磺的测定，结果满意。     

1,3,3a,5—四苯基—3a,4,5,11—四氢—3H,6H—1,2,4—三唑并（ …

通过２，４－二苯基－２，３－二氢－１Ｈ－１，５－苯并二氮杂Ｚｕｏ与苯甲酰氯苯腙的（２＋３）环加成反应制备了标题化合物，用Ｘ射线单晶衍射仪测定了其晶体结构，晶体属正交晶系，空间群为Ｆｄｄ２．晶胞参数；ａ＝１．７６２８（４）ｎｍ，ｂ＝５．７５１２（１２）ｎｍ，ｃ＝１．０２２７ｎｍ，Ｖ＝１０．３６８（５）ｎｍ＾３，Ｚ＝１６，Ｄｃ＝１．２６２ｇ．ｃｍ＾－３，μ＝０．０７５ｍｍ＾－１，Ｆ（０００）＝４１６０     

3,5—Br2—PADAP—IO^—30SCN—三元离子缔合物测定微量IO^— …

研究了３，５－Ｂｒ２－ＰＡＤＡＰ在酸性介质中质子化，与ＩＯ＾－３和ＳＣＮ＾－形成三元离子缔合物的最佳条件，其表现摩尔吸光系数为１．４＊１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，缔合物组成比为３，５－Ｂｒ２－ＰＡＤＡＰ：ＩＯ＾３：ＳＣＮ＾－＝１：１：１。     

银（I）—硫脲—四正丁基溴化铵体系电致化学发光法测定水中痕量银

本研究了银（Ｉ）－硫脲－四正丁基溴化铵体系的电致化学发光（ＥＣＬ）。发现在正矩形脉冲下，银对含有硫脲的ＴＢＡＢｒ的溶液ＥＣＬ有明显催化作用，银（Ｉ）的浓度在１．４×１０＾－８－３．５×１０＾－６ｍｏｌ／Ｌ范围内与有ＥＣＬ强度呈良好线性关系。检出限为９．０×１０＾－９ｍｏｌ／Ｌ，相对标准偏差为５％。用于天然水中银的测定，获得较满意的结果。     

meso—四（4—溴苯基）卟啉与Ag（I）的显色反应光度法研究

研究了ｐＨ１０．０，Ｔｗｅｅｎ－８０存在时，ｍｅｓｏ－四（４－溴苯基）卟啉与Ａｇ（Ｉ）络合显色的反应条件，络合物的最大吸收波长为４２７ｎｍ，表观摩尔吸光系数为３．５×１０５，Ａｇ（Ｉ）在０～０．４８ｍｇ／Ｌ范围内呈线性关系，回归方程为：Ａ＝０．１３１Ｃ＋０．００１２，相关系数γ＝０．９９９８。此法用于纯铅样和照相废液中痕量银的测定，结果与ＡＡＳ结果相比令人满意     

铽与1—苯基—3—甲基—4—异丁酰基吡唑啉酮—5和中性配体混配配合物…

合成了铽与１－苯基－３－甲基－４－异丁酰基吡唑啉酮和不同中性配体的４个三元配合物Ｔｂ（ＰＭＩＢＰ）３．２Ｈ２Ｏ、Ｔｂ（ｐｍｉｂｐ）３．Ｄｉｐｙ、Ｔｂ（ＰＭＩＢＰ）３、Ｐｈｅｎ和Ｔｂ（ＰＭＩＢＰ）３．２ＴＰＰＯ（Ｄｉｐｙ＝２．２’－联吡啶、Ｐｈｅｎ＝１，１０－邻菲罗啉，ＴＰＰＯ＝三苯基氧膦）。     

1—酰氧（胺）—2,8,9—三氧杂—5—氮杂—1—锡杂三环（3.3.3.0^1. …

合成了１４个新化合物，１－酰氧（胺）基－２，８，９－三氧杂－５－氮杂－１－锡杂三环（３．３．３．０＾１．５）十一烷，由ＩＲ，＾１ＨＮＭＲ，＾１３ＣＮＭＲ和＾１１９ＳｎＮＭＲ及元素分析确定其结构，该类化合物在ＣＤＣｌ３中可能形成六配位化合物，而在ＤＭＳＯ中，溶剂分子参与Ｓｎ原子配位，聚合体解聚为六配位化合物。     

3,6—二芳基—1,2,4—三唑并[3,4,b]—1,3,4—噻二唑化合物的合成

３－芳基－４－氨基－５－巯基－１，２，４－三唑与芳酸在三氯氧磷的作用下合成了１０个标题化合物，通过元素分析、红外光谱、核磁共振氢谱和质谱确证了它们的结构．对反应条件作了简略的讨论．部分化合物具有较强的生物活性．     

2，5，7，9－四硝基－2，5，7，9－四氮杂双环［4．3．0］壬－8－酮的合成

以乙二胺、乙二醛和脲为原料，通过曼尼希反应，合成了２，５，７，９－四氮杂双环［４．３，０］壬－８－酮盐酸盐（Ⅰ）．化合物Ⅰ在硝酸－乙酸酐体系中硝化，制得了标题化合物。     

二氧化碳和丙烯直接合成甲基丙烯酸的NiPMo/TiO2催化剂的研究

用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.     

Synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives

Different approaches for the synthesis of 1-benzyloxypyrazin-2(1H)-one derivatives from simple amino acids have been investigated. A library of 33 precursors for the preparation of N-hydroxy pyrazinones was obtained in moderate to good yields.     

α-Amino acid derived enaminones and their application in the synthesis of N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates and other heterocycles

A new and simple synthesis of novel N-protected methyl 5-substituted-4-hydroxypyrrole-3-carboxylates, which exist in equilibrium with their 4-oxo tautomers, has been developed in two steps starting from N-protected α-amino acids. The key intermediates are enaminones, which can also be isolated, characterized, and used for the construction of other functionalized heterocycles, before they spontaneously decompose to pyrrole products. 4-Hydroxypyrroles are prone to partial aerial oxidation but can be efficiently alkylated or reduced to stable polysubstituted pyrrolidine derivatives.     

Specific intramolecular aromatic CH insertion of diazosulfonamides

The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp³)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp²)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp²)?H and aliphatic 1,5- and 1,6-C(sp³)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp³)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp²)?H insertion.     

A general and convenient synthesis of 4-(tosylmethyl)semicarbazones and their use in amidoalkylation of hydrogen,heteroatom, and carbon nucleophiles

A general synthesis of previously unknown semicarbazone-based α-amidoalkylating reagents, 4-(tosylmethyl)semicarbazones, has been developed. The synthesis involved three-component condensation of semicarbazones of aliphatic or aromatic aldehydes with the same or other aldehydes and p-toluenesulfinic acid. The scope and limitations of this reaction were investigated. The compounds obtained were demonstrated to be an efficient α-(4-semicarbazono)alkylating agents. They were reacted with H- (sodium borohydride), O- (sodium methylate), S- (sodium phenylthiolate), N- (pyrrolidine, sodium succinimide), P- (trialkyl phosphites), and C-nucleophiles (sodium diethyl malonate) to give the corresponding products of the tosyl group substitution, 4-substituted semicarbazones, including analogues of nitrofurazone. Among the prepared compounds tested in vitro for antibacterial and antifungal activity, three nitrofuryl-containing semicarbazones exhibited high biological activities with minimum inhibitory concentration (MIC) values of 8–32 μg/mL.