THE APPLICATION OF Cu（facam）2 TO THE ASYMMETRIC CYCLOPROPANATION OF 2，5－DIMETHYL－2，4－HEXADIENE

ＴＨＥ　ＡＰＰＬＩＣＡＴＩＯＮ　ＯＦ　Ｃｕ（ｆａｃａｍ）２　ＴＯ　ＴＨＥ　ＡＳＹＭＭＥＴＲＩＣ　ＣＹＣＬＯＰＲＯＰＡＮＡＴＩＯＮ　ＯＦ　２，５－ＤＩＭＥＴＨＹＬ－２，４－ＨＥＸＡＤＩＥＮＥＴＨＥＡＰＰＬＩＣＡＴＩＯＮＯＦＣｕ（ｆａｃａｍ）２ＴＯＴＨＥ...     

等离子体原子发射光谱/质谱在新型陶瓷材料分析中的应用

本文对近几年来等离子体原子发射光谱（ＩＣＰ－ＡＥＳ）和等离子体质谱（ＩＣＰ－ＭＳ）在新型陶瓷材料分析中的应用进行了评述,讨论了应用ＩＣＰ－ＡＥＳ／ＭＳ技术测定陶瓷材料中痕量杂质的各种进样技术。引用文献６０篇。     

LASER-ENHANCED ELECTROCHEMICAL DOPING OF POLY (N-VINYLCARBAZOLE)

ＬＡＳＥＲ－ＥＮＨＡＮＣＥＤ　ＥＬＥＣＴＲＯＣＨＥＭＩＣＡＬ　ＤＯＰＩＮＧ　ＯＦ　ＰＯＬＹ　（Ｎ－ＶＩＮＹＬＣＡＲＢＡＺＯＬＥ）ＬＡＳＥＲ－ＥＮＨＡＮＣＥＤＥＬＥＣＴＲＯＣＨＥＭＩＣＡＬＤＯＰＩＮＧＯＦＰＯＬＹ（Ｎ－ＶＩＮＹＬＣＡＲＢＡＺＯＬＥ）Ｙａ...     

电感耦合等离子体原子发射光谱测定镁—钕合金中稀土和非稀土元素

本文研究了ＩＣＰ－ＡＥＳ测定Ｍｇ－Ｎｄ合金样品中１０种元素的分析方法。选择了同时测定合金中Ｌａ、Ｃｅ、Ｐｒ、Ｓｍ、Ｆｅ、Ａｌ、Ｍｏ、Ｎｉ、Ｃｕ和高含量Ｎｄ（２０％）的条件。得到了满意结果。     

PARAMAGNETIC AND DIAMAGNETIC DICOPPER（Ⅱ） COMPLEXES WITH DI－SCHIFF BASE DERIVED FROM 2－HYDROXY－1－NAPHTHALDEHYDE AND1，3－DIANINO－2－PROPANOL

ＰＡＲＡＭＡＧＮＥＴＩＣＡＮＤＤＩＡＭＡＧＮＥＴＩＣＤＩＣＯＰＰＥＲ（Ⅱ）ＣＯＭＰＬＥＸＥＳＷＩＴＨＤＩ－ＳＣＨＩＦＦＢＡＳＥＤＥＲＩＶＥＤＦＲＯＭ２－ＨＹＤＲＯＸＹ－１－ＮＡＰＨＴＨＡＬＤＥＨＹＤＥＡＮＤ１，３－ＤＩＡＮＩＮＯ－２－ＰＲＯＰＡＮＯＬ...     

FERROMAGNETICALLY COUPLED BINUCLEAR Fe（Ⅲ） COMPLEXES THROUGH ISOPHTHALATO－BRIDGE

ＦＥＲＲＯＭＡＧＮＥＴＩＣＡＬＬＹ　ＣＯＵＰＬＥＤ　ＢＩＮＵＣＬＥＡＲ　Ｆｅ（Ⅲ）　ＣＯＭＰＬＥＸＥＳ　ＴＨＲＯＵＧＨ　ＩＳＯＰＨＴＨＡＬＡＴＯ－ＢＲＩＤＧＥＦＥＲＲＯＭＡＧＮＥＴＩＣＡＬＬＹＣＯＵＰＬＥＤＢＩＮＵＣＬＥＡＲＦｅ（Ⅲ）ＣＯＭＰＬＥＸＥ...     

SYNTHESIS AND POTENTIAL ANTINEOPLASTIC ACTIVITY OF α－（1－CYCLOPENTENYL） CYCLOPENTANONE DERIVATIVES －A NEW FAMILY OF ANTICANCER AGENTS

ＳＹＮＴＨＥＳＩＳＡＮＤＰＯＴＥＮＴＩＡＬＡＮＴＩＮＥＯＰＬＡＳＴＩＣＡＣＴＩＶＩＴＹＯＦα－（１－ＣＹＣＬＯＰＥＮＴＥＮＹＬ）ＣＹＣＬＯＰＥＮＴＡＮＯＮＥＤＥＲＩＶＡＴＩＶＥＳ－ＡＮＥＷＦＡＭＩＬＹＯＦＡＮＴＩＣＡＮＣＥＲＡＧＥＮＴＳ￥ＣｈｕａｎＭ...     

SYNTHESIS OF THERMOTROPIC LIQUID CRYSTAL AROMATIC COPOLYESTERS AND COPOLY （ESTER－AMIDE）S CONTAINING DI （ETHYLOXY－ETHER） AS THE SPACER

ＳＹＮＴＨＥＳＩＳ　ＯＦ　ＴＨＥＲＭＯＴＲＯＰＩＣ　ＬＩＱＵＩＤ　ＣＲＹＳＴＡＬ　ＡＲＯＭＡＴＩＣ　ＣＯＰＯＬＹＥＳＴＥＲＳ　ＡＮＤ　ＣＯＰＯＬＹ　（ＥＳＴＥＲ－ＡＭＩＤＥ）Ｓ　ＣＯＮＴＡＩＮＩＮＧ　ＤＩ　（ＥＴＨＹＬＯＸＹ－ＥＴＨＥＲ）　ＡＳ　ＴＨ...     

氟化电热蒸发／ICP—AES直接测定SiO2中痕量Fe

对氟化电热蒸发（ＦＥＴＶ）／ＩＣＰ－ＡＥＳ技术中元素的氟化蒸发行为，基体效应和粒度效应进行了考察，确定了杂质（Ｆｅ）与基体（Ｓｉ）分离的最佳实验条件，本法用于ＳｉＯ２中痕量Ｆｅ的直接测定，有灵敏，简便，试样消耗少和不需化学处理等优点。     

STUDIES ON THE NON－ISOTHERMAL KINETICS OF THERMAL DECOMPOSITIONS OF THE COMPLEXES OF Cd（II）WITH O－VANILLIN THIOSEMICARBAZONE AND IRON（III）WITH 2－［（O－HYDROXYBENZYLIDENE）AMINO］PHENOL AND PYRIDINE

ＳＴＵＤＩＥＳＯＮＴＨＥＮＯＮ－ＩＳＯＴＨＥＲＭＡＬＫＩＮＥＴＩＣＳＯＦＴＨＥＲＭＡＬＤＥＣＯＭＰＯＳＩＴＩＯＮＳＯＦＴＨＥＣＯＭＰＬＥＸＥＳＯＦＣｄ（ＩＩ）ＷＩＴＨＯ－ＶＡＮＩＬＬＩＮＴＨＩＯＳＥＭＩＣＡＲＢＡＺＯＮＥＡＮＤＩＲＯＮ（ＩＩＩ）ＷＩＴ...     

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.