铽与4—酰代吡唑啉酮—5的三元配合物的合成与荧光性质

合成并表征了一系列铽与含不同４－酰代的１－苯基－３－甲基－吡唑啉酮－５的三元配合物Ｔｂ９Ｌ）３．２Ｈ２Ｏ和Ｔｂ（Ｌ）３．Ｄｉｐｙ「Ｌ＝１－苯基－３－甲基－４－乙酰基吡啥林酮－５（ＰＭＡＰ），１－苯基－３－甲基－４－丙酰基吡唑啉酮－５（ＰＭＰＰ），１－苯基－３－甲基－４－异丁酰基吡唑啉酮－５（ＰＭＩＢＰ），１－苯基－３－甲基－４－特戊酰基吡唑啉酮－５（ＰＭＰＶＰ），１－苯基－３－甲基－４－苯甲酰基吡     

5—（5—硝基—2—吡啶偶氮）—2,4—二氨基甲苯与钌的显色反应及其应用

报道以５－（５－硝基－２－吡啶偶氮）－２，４－二氨基甲苯（５－ＮＯ２－ＰＡＤＡＴ＿作为测定钌的分光光度法。在４０％乙醇存在下ＰＨ４．０－６．５乙酸－乙酸钠缓冲溶液中５－ＮＯ２－ＰＡＤＡＴ与Ｒｕ（Ⅱ）形成稳定的红色络合物。该络合物的无机酸作用下，可转变为另一型人有较高吸收特性的络合物，适宜酸度范围分别为０．１２－２．０ｍｏｌ／ＬＨＣｌ，０．１２－１．２ｍｏｌ／ＬＨＣｌＯ４，０．１２－１．０ｍｏｌ／Ｌ     

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）。     

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。     

一个新的铀（Ⅵ）三元协萃体系

研究了由４，４＇－癸二酰－双－（１－苯基－３－甲基－５－吡唑啉酮）（ＤＢＰＭＰ，简作Ｈ２Ａ），氧化三辛基膦（ＴＯＰＯ），吡啶（Ｐｙ）组成的三元体系从硝酸溶液中对铀的协同萃取，斜率法确定萃合物组成为ＵＯ２Ａ．ＴＯＰＯ．Ｐｙ，制取了固体协萃配合物，并用元素分析、ＩＲ及ＨＮＭＲ等进行了表征。     

Zn（ClO4）2—DAPTU（MAPTU）—H2O三元体系30℃时的相平衡研究

测定了三元体系Ｚｎ（ＣｌＯ４）２－Ｌ－Ｈ２Ｏ（Ｌ＝ＤＡＰＴＵ，Ｎ，Ｎ＇－二安替比林硫脲，Ｌ＝ＭＡＰＴＵ，Ｎ－甲基Ｎ＇－安替比林硫脲）在３０℃时的溶解度和饱和溶液的折学率，绘制了相应的溶度图和折光率、组成图。体系的浓度曲线和折光率曲线均由３支组成，民Ｌ（Ｌ＝ＤＡＰＴＵ，ＭＡＰＴＵ）、Ｚｎ（ＣｌＯ４）２．Ｌ２．ｎＨ２Ｏ（Ｌ＝ＤＡＰＴＵ，ｎ＝２；Ｌ＝ＭＡＰＴＵ，ｎ＝０）和Ｚｎ（ＣｌＯ４）２．６Ｈ２Ｏ相应     

Zn（ClO_4）_2－DAPTU（MAPTU）－H_2O三元体系30℃时的相平衡研究

测定了三元体系Ｚｎ（ＣｌＯ４）２－Ｌ－Ｈ２Ｏ（Ｌ＝ＤＡＰＴＵ，Ｎ，Ｎ′－二安替比林硫脲；Ｌ＝ＭＡＰＴＵ，Ｎ－甲基－Ｎ′－安替比林硫脲）在３０℃时的溶解度和饱和溶液的折光率，绘制了相应的溶度图和折光率－组成图．体系的溶度曲线和折光率曲线均由３支组成，分别与Ｌ（Ｌ＝ＤＡＰＴＵ，ＭＡＰＴＵ）、Ｚｎ（ＣｌＯ４）２·Ｌ２·ｎＨ２Ｏ（Ｌ＝ＡＰＴＵ．ｎ＝２；Ｌ＝ＭＡＰＴＵ，ｎ＝０）和Ｚｎ（ＣｌＯ４）２·６Ｈ２Ｏ相对应．从溶度图上发现两个未见报道的固液异组成溶解的化合物，经化学分析、元素分析、ＴＧ－ＤＴＡ、ＩＲ表征，结果表明，三元化合物Ｚｎ（ＤＡＰＴＵ）２（ＣｌＯ４）２．２Ｈ２Ｏ中ＤＡＰＴＵ是以两个羧基氧与Ｚｎ２＋离子配位，而在二元化合物Ｚｎ（ＭＡＰＴＵ）２（ＣｌＯ４）２中ＭＡＰＴＵ则以氧和硫原子与Ｚｎ（２＋）离子配位。     

四元体系KCl—K2SO4—CO（NH2）2—H2O在25℃时的等温溶度研究

测定了四元体系ＫＣｌ－Ｋ２Ｓｏ４－ＣＬ）ＮＨ２）２－Ｈ２Ｏ及边界三元体系Ｋ２ＳＯ４－ＣＯ（ＮＨ２）２－Ｈ２Ｏ在２５℃时的溶度及饱和溶液密度和折光率，绘制敢相应的溶度图及相应的组成－性质图，测定并绘制了该四元体系Ｋ２ＳＯ４单饱区的溶度面，折光率面和面图，两个体系的溶度图均属于低共饱型，平衡固相为组份化合物。     

1,9—双（1′—苯基—3′—甲基—5′—氧代吡唑—4′—基）壬二酮—（1,9）与三？…

研究了１，９－双（１′－苯基－３′－甲基－５′－氧代吡唑－４′－基）壬二酮－（１，９）（ＢＰＭＰＮＤ，Ｈ２Ａ）与三辛基氧膦（ＴＯＰＯ，Ｂ）的氯仿溶液，从硝酸介质中对Ｌａ（Ⅲ），Ｄｙ（Ⅲ）的协同萃取，计算了体系的酸性协萃系数ＲＡ和协萃系数Ｒ，用斜率法测得协萃合物的组成ＬａＡ．ＨＡ．Ｂ和ＤｙＡ．ＨＡ．Ｂ计算了协萃取平衡常数，研究了温度对协萃反应的影响，用萃取法制得了固态协萃合物，并对其组成，ＩＲ及ＴＧ     

用2—羟基—3—羧基—5—磺酸基苯重氮氨基偶氮苯流动注射分光光度法测定汞

研究了在乳化剂ＯＰ存在下，２－羟基－３－羧基－５－磺酸基苯重氮氨基偶氮苯（ＨＣＳＤＡＡ）－汞（Ⅱ）显色体系流动注射分光光度法。用ＰＨ１０．０－１０．５的Ｎａ２Ｂ４Ｏ７－ＮａＯＨ缓冲溶液作载流，汞（Ⅱ）与ＨＣＳＤＡＡ和乳化剂ＯＰ的混合试剂反应形成红色络合物。用于测定汞时，方法的线性范围是０．０５－１．０ｍｇ／Ｌ，检测限为０．０１６ｍｇ／Ｌ，进样频率为１００样／ｈ。直接应用于头发、自来水和废水中微量汞     

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.