稀土钼磷杂多蓝的合成、性质及防治植物病毒的研究

采用电解法合成了Ｋｅｇｇｉｎ结构稀土钼磷二,四电子杂多蓝,通式为ＬｎＨ２「ＰＭｏ＾Ｖ１１０Ｍｏ２＾ｖＯ４０」,ｎＨ２Ｏ和ＬｎＨ４「ＰＭｏ＾ＶＩ８Ｍｏ＾ｖ４Ｏ４０」．ｎＨ２Ｏ（Ｌｎ＝Ｌａ,Ｃｅ,Ｐｒ,Ｎｄ,Ｓｍ,Ｇｄ）。     

稀土元素1∶12系列钨锗杂多配合物的合成及性质研究

本文首次合成出八种Ｋｅｇｇｉｎ结构的稀土元素钨锗杂多配合物ＬｎＨＧｅＷ１２Ｏ４０·ｘＨ２Ｏ（简写为ＬｎＨＧｅＷ１２，Ｌｎ＝Ｌａ，Ｃｅ，Ｐｒ，Ｎｄ，Ｓｍ，Ｅｕ，Ｇｄ，Ｙｂ；ｘ＝１８～２８）。用ＩＣＰ，１８３ＷＮＭＲ，Ｘ射线粉末衍射，ＩＫ，ＵＶ，循环伏安和ＴＧ－ＤＴＡ热分析等手段，对这些杂多配合物进行了表征和性质研究，讨论了结构和性质的关系，为此类配合物的催化应用提供了有益信息。     

Keggin结构合钒混配型杂多蓝的离析和性质研究

本文利用控制电位电解法首次制备出三元、四元含钒混配型－电子杂多蓝Ｋ４Ｈ２《ＳｉＶ＾ⅣＭｏ２Ｗ９Ｏ４０］．１２Ｈ２Ｏ和两电子杂多蓝Ｋ４Ｈ５［Ｓｉ＾ⅣＶ＾ⅤＷ９Ｏ４０］．１１Ｈ２Ｏ通过元素分析，ＩＲ、ＵＶ－可见电子光谱，ＥＳＲ、ＸＰＳ和Ｘ射线粉末衍射对产物进行了表征和性质研究，结果表明：杂多酸盐还原为杂多蓝后仍保持Ｋｅｇｇｉｎ结构，但结构发生畸变，畸变程度随钒原子数值多而增大，还原电子具有一定的离域性     

Keggin结构合钒混配型杂多蓝的离析和性质研究

本文利用控制电位电解法首次制备出三元、四元含钒混配型—电子杂多蓝Ｋ４Ｈ２［ＳｉＶⅣＭｏ２Ｗ９Ｏ４０］·１２Ｈ２Ｏ和两电子杂多蓝通过元素分析、ＩＲ、ＵＶ—可见电子光谱、ＥＳＲ、ＸＰＳ和Ｘ射线粉末衍射对产物进行了表征和性质研究．结果表明：杂多酸盐还原为杂多蓝盾仍保持Ｋｅｇｇｉｎ结构，但结构发生畸变，畸变程度随机原子数增多而增大．还原电子具有一定的离域性，并且离域程度与中心杂原子的种类有关．     

稀土锗钨钒酸根多元杂多配合物的合成和性质

合成了通式为Ｋ１３Ｈ２「Ｌｎ（ＧｅＷ１０ＶＯ３９）２」．ｎＨ２Ｏ（Ｌｎ＝Ｌａ,Ｃｅ,Ｐｒ,Ｎｄ,Ｓｍ,Ｅｕ,Ｇｄ,Ｔｂ,Ｄｙ,Ｙｂ）的１０种杂多配合物。利用ＩＲ,ＵＶ,ＥＳＲ,ＸＰＳ,Ｘ射线粉末衍射和磁化率对其结构进行了表征：循环伏安和极谱法研究了配合物的氧化还原性质,得出配合物经历了３步还原,第一步为钒的双电子可逆还原,第二步和第三步均为钨的不可逆还原;借助认温ＩＲ、变温ＸＲＤ和ＴＧ－ＤＴＡ研究     

取代型钨镓杂多配合物的导电性及其磁性

合成了过渡金属取代的钨镓杂多配合物α－Ｎａ７「ＧａＷ１１Ｃｏ（Ｈ２Ｏ）Ｏ３９」．１６Ｈ２Ｏ，α－Ｎａ７Ｈ２「ＧａＷ１０Ｃｏ２（Ｈ２Ｏ）２Ｏ３９」．１６Ｈ２Ｏ和α－ＮａｎＨｍ「ＧａＷ９ＭＥ（Ｈ２Ｏ）３Ｏ３７」．１６Ｈ２Ｏ「Ｍ＝Ｃｏ（Ⅱ），Ｎｉ（Ⅱ，）Ｖ（Ⅴ）」，通过红外，紫外，ＩＣＰ，ＴＧ－ＤＴＡ，ＥＰＲ，ＸＰＳ，＾１８３ＷＮＭＲ，极谱等手段进行了表征。     

甘氨酸的杂多酚超分子化合物的合成及性质研究

首次合成了甘氨酸的Ｋｅｇｇｉｎ结构杂多酸超分子化合物（ＨＧｌｙ）３「ＰＷ１２Ｏ４０」．５Ｈ２Ｏ（ＨＧｌｙ）４「ＳｉＷ１２Ｏ４０」．４Ｈ２Ｏ,用元素分析,ＩＲ,ＵＶ,ＴＧ－ＤＴＡ,ＸＲＤ和ＮＭＲ等方法对标题化合物进行了表征,并讨论了它们的合成条件及结构特性。     

稀土元素1：12系列钨锗杂多配合物的合成及性质研究

本文首次合成出八种Ｋｅｇｇｉｎ结构的稀土元素钨锗杂多配合物ＬｎＨＧｅＷ１２Ｏ４０．ｘＨ２Ｏ。用ＩＣＰ，＾１８３ＷＮＭＲ，Ｘ射线粉末衍射，ＩＲ，ＵＶ，循环伏安和ＴＧ－ＤＴＡ热分析等手段，这些杂多配合物进行了表征和性质研究。讨论了结构和性质的关系，为此类配合物的催化应用提供了有效信息。     

镧系元素Dawson结构钨钒磷四元杂多配合物的合成,表征以…

合成了通式为Ｋ１５Ｈ３〔Ｃｅ（Ｐ２Ｗ１６ＶＯ６１）２〕．６１Ｈ２Ｏ、Ｋ１５Ｈ４〔Ｌｎ（Ｐ２Ｗ１６ＶＯ６１）２〕．ｘＨ２Ｏ（Ｌｎ＝Ｌａ＾３＋，Ｐｒ＾３＋，Ｎｄ＾３＋，Ｓｍ＾３＋，Ｅｕ＾３＋，Ｇｄ＾３＋，Ｄｙ＾３＋，Ｙｂ＾３＋）的９种镧系元素Ｄａｗｓｏｎ结构的钨钒磷四元杂多配合物，并用ＩＲ、ＵＶ、ＮＭＲ、ＥＳＲ、ＸＲＤ、ＴＧ－ＤＴＡ等对其结构和性质进行子研究。该类配合物具有与Ｋ１６〔Ｃｅ（Ｐ２Ｗ１７Ｏ     

希土元素1:12系列杂多配合物的氧化还原性和稳定性质研究

本文用极谱，循环伏安和紫外吸收光谱方法研究了２１种含钨１：１２系列稀土元素杂多配合物ＬｎＰＷ１２Ｏ４０、ＬｎＨＳｉＷ１２Ｏ４０和ＬｎＨＧｅＷ１２Ｏ４０（Ｌｎ＝Ｌａ，Ｃｅ，Ｐｒ，Ｎｄ，Ｓｍ，Ｅｕ，Ｇｄ）的氧化还原性质和溶液稳定性，讨论了抗衡离子、介质和酸度等因素对杂多阴离子氧化还原性的影响，对三种不同中心原子的杂多阴离子氧化还原顺序进行了比较，探讨了极谱半波电位与ｐＨ的关系，提出了氧化还原机理。     

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.