meso—四（4—磺苯基）卟啉对铕（Ⅲ）与羧酸络合物电还原的催化作用

水溶液中Ｅｕ＾３＋与ｍｅｓｏ－四（４－磺苯基）卟啉（ＴＰＰＳ）不易形成卟啉络合物，但在乙酸，酒石酸，丙二酸等共存时，在循环伏安图上可得一对Ｅｕ＾３＋还原－氧化的可逆或准可逆峰，此峰与Ｅｕ＾３＋在ＮａＣｌＯ４底液中的还原峰相比，峰电位正移，峰电流增高，从６种Ｅｕ＾３＋－羧酸络合物与ＴＰＰＳ共存时的实验中证明这些络合物并没有和ＴＰＰＳ形成三元络合物，而是吸附在汞电极上的ＴＰＰＳ产生电催化作用。     

邻菲啰啉和过氧化氢对锰－卟啉显色反应的影响

本文研究了在邻菲啰啉，过氧化氢存在下，Ｔ（４－ＭＰ）ＰＳ＿４、ＴＰＰＳ＿４、Ｔ（４－ＭＯＰ）ＰＳ＿４、Ｔ（４－ＨＰ）ＰＳ＿４、Ｔ（３－ＣＩＰ）ＰＳ＿４、Ｔ（３－ＢｒＰ）ＰＳ＿４等六种卟啉试剂与锰的显色反应。结果表明，当溶液ｐＨ为９．１５～９．３５时，邻菲啉和过氧化氢对锰与卟啉试剂显色反应协同增敏作用显著。加入表面活性剂ＣＴＭＡＢ，增强了配合物的稳定性和灵敏度。表观摩尔吸光系数高达１０￣７Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１）。本法用于测定食品中的痕量锰，结果满意。     

H4TPP^2＋吸附在Ag溶胶表面的吸收光谱

本文研究了５，１０，１５，２０－四苯基中啉二酸吸附在Ａｇ溶胶表面的吸收光谱。发现Ｈ４ＴＰＰ＾２＋吸附在Ａｇ溶胶表面的去质子化现象，生成游离碱卟啉Ｈ２ＴＰＰ，随样品放置时间延长，卟啉分子进一步发生络合反应，生成Ａｇ（Ⅱ）ＴＰＰ。对络合反应的过程和机理进行了讨论。     

（TPPS4）2二聚体系吸光光度法测定铜的研究

研究了ｐＨ４．０－６．０，乙酸－乙酸钠体系中ｍｅｓｏ－四（４－磺酸苯基）卟啉发二聚反应的条件。ＴＰＰＳ４二聚物在４８９ｎｍ处有一个较强的吸收峰，利用Ｖｕ＾２＋－ＴＰＰＳ４络合物的形成使此峰线性降低，从而测定痕量铜，表观摩尔吸光系数为５．０＊１０＾５，与ＡＡＳ值相比较，结果令人满意。     

在邻菲罗啉类试剂存在下银与卟啉显色反应的研究

本文研究了三种邻菲罗啉类试剂对银（Ⅰ）与六种不同取代基卟啉试剂显色反应的影响。研究结果表明：于ｐＨ９．２时在３５～４０℃放置１０～１５ｍｉｎ，银与邻菲罗啉类试剂和卟啉试剂能形成多元络合物。我们分别测定了Ａｇ－ｐｈｅｎ－ＴＰＰＳ４、Ａｇ－ｐｈｅｎ－Ｔ（４－ＭＯＰ）ＰＳ４和Ａｇ－ｐｈｅｎ－Ｔ（４－ＨＰ）ＰＳ４体系的络合比及稳定常数，详细讨论了Ａｇ－ｐｈｅｎ－Ｔ（４－ＭＯＰ）ＰＳ４体系的光度性质，把所确     

酸度对AgCl溶胶表面吸附H2TPP的化学反应的影响

讨论了ｍｅｓｏ－四苯基卟啉（Ｈ２ＴＰＰ）吸附在ＡｇＣｌ溶胶表面的吸收光谱。实验表明,当ｐＨ＝２．０￣６．０时,Ｈ２ＴＰＰ吸附于ＡｇＣｌ溶胶表面以卟啉二酸Ｈ４ＴＰＰ＾２＋存在;当ｐＨ＝６．７５￣１１．０时,Ｈ２ＴＰＰ吸附于ＡｇＣｌ溶胶表面发生络合反应,生成二阶银络合物Ａｇ（Ⅱ）ＴＰＰ,并且络合反应的速率随ＰＨ值的增大而增快。     

meso—四（4—磺基苯基）卟啉（TPPS）在水及胶束体系中的二聚行为研究

研究了ｍｅｓｏ－四（４－磺基苯基）卟啉在胶束，ＫＣｌ水溶液中的电子吸收光谱变化，计算了ＴＰＰＳ的二聚常数ＫＤ，用分光光度法研究了ＴＰＰＳ在ＫＣｌ水溶液中的二聚反应动力学，提出了与实验结果相吻合的二聚机理。根据温度对二聚平衡的影响。     

卟啉试剂光度法间接测定硫离子的研究（1）

本文以ＴＰＰＳ４、Ｔ（４－ＭＯＰ）ＰＳ４和Ｔ（４－ＭＰ）ＰＳ４为例，研究了Ａｇ·ｐｈｅｎ·ＰＰ光度法间接测定废水中痕量硫离子的有关条件。同时用上述三种卟啉试剂试验了Ｃｕ￣（２＋）、Ｈｇ￣（２＋）、Ｃｄ￣（２＋）、Ｐｂ￣（２＋）等软酸和交界酸间接测定Ｓ￣（２－）的可能性，结果表明，Ｈｇ－ＰＰ也可用于间接测定Ｓ（２－）。最后，对Ｈ＿２Ｓ的吸收液进行了筛选。     

meso—四（4—磺基苯基）卟啉双波长分光光度法测定阳离子表面活性剂

在酸性条件下，阳离子表面活性剂使ｍｅｓｏ－四（４－磺基苯基）卟啉（ＴＰＰＳ４）发生Ｊ－型聚合，在４９０ｎｍ处出现Ｊ－型聚集吸收并导致位于４３４ｎｍ的Ｓｏｒｅｔ吸收带降低。阴离子表面活性剂如十二烷基硫酸钠（ＳＤＳ）使聚集更一步增强，据此建立起水中痕量阳离子表面活性剂的双波长分光光度测定，方法成功地应用于合成和实际水样分析。     

酸度对AgCl溶胶表面吸附H2TPP化学反应的影响

讨论了ｍｅｓｏ四苯基卟啉（Ｈ２ＴＰＰ）吸附在ＡｇＣｌ溶胶表面的吸收光谱。实验表明,当ｐＨ＝２．０～６．０时,Ｈ２ＴＰＰ吸附于ＡｇＣｌ溶胶表面以卟啉二酸Ｈ４ＴＰＰ２＋存在;当ｐＨ＝６．７５～１１．０时,Ｈ２ＴＰＰ吸附于ＡｇＣｌ溶胶表面发生络合反应,生成二价银络合物Ａｇ（Ⅱ）ＴＰＰ,并且络合反应的速率随ｐＨ值的增大而加快。     

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.     

Toward new camptothecins. Part 6: Synthesis of crucial ketones and their use in Friedländer reaction

In the context of the preparation of camptothecin and luotonin A analogs, the synthesis of some key keto-precursors and their use in Friedländer condensation are described. This paper also focuses on the stability of these keto intermediates and emphasizes the major differences between indolizinones and pyrroloquinazolinones series. Noteworthy is also the report of some original structures isolated as by-products of some experiments.     

CoFe2O4自形成磁性液体场致结构化对磁化的影响

The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.     

Highly regioselective Buchwald–Hartwig amination at C-2 of 2,4-dichloropyridine enabling a novel approach to 2,4-bisanilinopyridine (BAPyd) libraries

The highly regioselective Buchwald–Hartwig amination at C-2 of the cheap and readily accessible reagent, 2,4-dichloropyridine with a range of anilines and heterocyclic amines is described. This new methodology is robust and provides a facile access to 4-chloro-N-phenylpyridin-2-amines on 0.25 mol scale. These intermediates undergo a further Buchwald–Hartwig amination at higher temperature to enable rapid exploration of the chemical space at C-4 and to provide a library of 2,4-bisaminopyridines.     

KMnO4-mediated oxidative CN bond cleavage of tertiary amines: Synthesis of amides and sulfonamides

KMnO₄-mediated oxidative CN bond cleavage of tertiary amines producing secondary amine was introduced, which was trapped by electrophiles (acyl chloride and sulfonyl chloride) to form amides and sulfonamides. The reaction could take place at mild condition, tolerating a wide range of function groups and affording products in moderate to excellent yields.     

Chemistry of heterocyclic compounds at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, over 50 years (Review)

The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.     

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.     

Sulfur-directed metal-free and regiospecific methyl C(sp3)–H imidation of thioanisoles

Regiospecific and direct imidation of the methyl C(sp³)–H bond of thioanisoles is realized under mild and metal-free conditions with N-fluorobis(benzenesulfonyl)imide as an oxidant and nitrogen source. Proposed mechanism suggests that thionium ion intermediates and a Pummerer-type reaction are involved. The imidation has advantages such as high step-economy, excellent functionality tolerance, and regiospecificity, giving structurally diverse imidation products.     

Synthesis of novel chiral bidentate hydroxyalkyl-N-heterocyclic carbene ligands and their application in palladium-catalyzed Mizoroki–Heck couplings and asymmetric addition of diethylzinc to benzaldehyde

A small library of new chiral bidentate hydroxyalkyl-imidazolium salts 1 is conveniently synthesized on multi-gram scale from inexpensive and commercially available chiral pool amino acids. The corresponding carbenes, generated by deprotonation of imidazolium salts 1, in combination with palladium(II) chloride were tested in the Mizoroki–Heck coupling reaction. The most significant results in terms of yields and reactivities were achieved with low catalyst loading. The catalytic activities of these imidazolium salts were also investigated in the asymmetric addition of diethylzinc to benzaldehyde. The use of MgO nanoparticles as an additive in conjunction with these ligands played a crucial role in increasing the efficiency of these reactions.