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。     

杂核簇合物μ_3－CphCoMM＇的合成及结构表征

本文利用等电子金属碎片交换法，由μ３－ＣＰｈＣｏ３（ＣＯ）９（１）与ＮａＭ（ＣＯ）３Ｃｐ’（Ｍ＝Ｍｏ，Ｗ；ＣＰ’＝ＣＨ３Ｃ５Ｈ４）反应根到μ３－ＣＰｈＣｏ２Ｍ（ＣＯ）８ＣＰ’（２ａ，ｂ），μ３—ＣＰｈＣｏＭｏ２（ＣＯ）７Ｃｐ＇２（４），再由２ａ与Ｎａ２［Ｆｅ（ＣＯ）４］反应得到手征性簇合物μ３－ＣＰｈＦｅＣｏＭｏ（ＣＯ）２ＣＰ＇Ｈ（３），对合成的簇合物进行了元素分析、ＩＲ、１ＨＮＭＲ．ＭＳ分析表征．     

［Vmo_3O_4（O_2CEt）_8］_2Na_2的合成与结构

［ＶＭｏ３Ｏ４（Ｏ２ＣＥｔ）８］２Ｎａ２（１），三斜晶系，Ｐ１空间群，ａ＝１２．９７７（７），ｂ＝１４．０７０（６），ｃ＝１２．３３８（８），α＝１０９．８１（４），β＝１１７．２０（４），γ＝９０．５１（５）°，Ｖ＝１８４８．８３，Ｍｒ＝２０２０．６，Ｄｃ＝１．８１ｇ／ｃｍ３，Ｚ＝１，Ｆ（０００），μ＝１２．９ｃｍ１（ＭｏＫα）对３７４２个可观测反射点（Ｉ＞３σ（Ｉ））最终一致性因子为Ｒ＝０．０１８，Ｒω＝０．０５４。单晶结构分析表明，簇阴离子中两个［Ｍｏ３Ｏ４］４＋单元通过两个＂桥＂金属Ｖ原子连接成一个奇特的环状结构，Ｍｏ－Ｍｏ平均键长为２．５１９（１），Ｍｏ…Ｖ间平均距离为３．６５４。簇阴离子通过Ｎａ＋连成一个一维长链，Ｎａ原子与氧原子形成一个少见的五配位三角双锥结构，Ｎａ－Ｏ距离仅为２．３１２，Ｎａ－Ｏ间较强的相互作用以及无限长链的晶体结构很好地解释了簇合物（１）的稳定性和不溶性。     

过氧杂多阴离子柱撑水滑石类层状化合物的合成与表征

以硝酸根型水滑石作交换前驱体，通过离子交换法合成了过渡金属离子一、三钛取代的Ｋｅｇｇｉｎ结构过氧钨硅杂多阴离子柱撑水滑石Ｚｎ２Ａｌ（ＯＨ）６－［ＳｉＷ１１（ＴｉＯ２）Ｏ３９］及Ｚｎ２Ａｌ（ＯＨ）６－［ＳｉＷ９（ＴｉＯ２）３Ｏ３７］，用元素分析、ＸＲＤ、ＩＲ、ＸＰＳ、化学分析等手段对产物的组成和结构进行了表征。结果表明，过氧杂多阴离子进入水滑石层间，使水滑石的层间距从０．９２ｎｍ增加到１．４７ｎｍ。     

As-V-O簇合物对乙苯选择氧化反应的催化活性

通过水热方法合成了簇合物［Ｎ（ＣＨ３）４］４［Ａｓ８Ｖ１４Ｏ４２（８Ｈ２Ｏ）］及其相近的同多及杂多钒氧簇Ｋ６Ｖ１０Ｏ２８·９Ｈ２Ｏ，ＮａＫＶ２Ｏ６，（Ｈ２Ｅｎ）０．５Ｖ２Ｏ５，（Ｈ２Ｅｎ）３（ＶＯ）９（ＰＯ４）８，Ｎａ３ＶＯ（ＨＰＯ４）（ＰＯ４）·Ｈ２Ｏ．运用ＸＲＤ和ＩＲ等手段表征了［Ｎ（ＣＨ３）４］４［Ａｓ８Ｖ１４Ｏ４２（８Ｈ２Ｏ）］的结构．该类化合物对于催化乙苯过氧化氢选择氧化制苯乙酮具有较高的催化活性．通过比较含钒与不含钒化合物的活性情况，讨论了催化氧化的活性中心．     

2-溴代对苯二甲酸根桥联双核钴(Ⅱ)配合物的合成、磁性及抗癌活性

合成了三种以２－溴代对苯二甲酸根为桥联配体的新型双核钴（Ⅱ）的配合物，即［Ｃｏ２（ＢＴＰ）（ｐｈｅｎ）４］（ＣｌＯ４）２·Ｈ２Ｏ（配合物１）、［Ｃｏ２（ＢＴＰ）（Ｎｐｈｅｎ）４］（ＣｌＯ４）２·２Ｈ２Ｏ（配合物２）和［Ｃｏ２（ＢＴＰ）（Ｂｐｙ）４］（ＣｌＯ４）２·２Ｈ２Ｏ（配合物３）（ＢＴＰ＝２－溴代对苯二甲酸根，ｐｈｅｎ＝１，１０－菲罗啉，Ｎｐｈｅｎ＝５－硝基－１，１０－菲罗啉，Ｂｐｙ＝２，２′－联吡啶）。使用元素分析、ＩＲ、ＵＶ－Ｖｉｓ光谱和电导测定方法对该配合物进行了表征。测定了配合物的变温磁化率，并对所得数据进行了理论分析，求得了配合物１、配合物２和配合物３的自旋磁交换积分分别为：２Ｊ＝－６．５ｃｍ－１，２Ｊ＝－７．８ｃｍ－１和２Ｊ＝－８．９ｃｍ－１。对该三配合物进行了体外抗人白血病癌细胞的实验。发现该三配合物均具有一定的抑制癌细胞的活性     

过渡元素Dawson结构的钨钒磷四元杂多配合物的合成与表征

制备了两个系列１２种尚未见文献报道的过渡金属Ｄａｗｓｏｎ结构的钨钒磷四元杂多配合物。经元素分析和热重分析确定配合物通式为Ｋ９，１０［Ｐ２Ｍ（Ｈ２Ｏ）Ｗ１５Ｖ２Ｏ６１］．ｘＨ２Ｏ和Ｋ１０，，１１［Ｐ２Ｍ（Ｈ２Ｏ）Ｗ１４Ｖ３Ｏ６１］．ｘＨ２Ｏ）（Ｍ＝Ｆｅ＾３＾＋，Ｃｏ＾３＾＋，Ｎｉ＾２＾＋，Ｍｎ＾２＾＋，Ｃｕ＾２＾＋，Ｚｎ＾２＾＋＿），采用ＩＲ，ＵＶ，ＮＭＲ，ＥＳＲ和ＸＲＤ等方法进行了结构表征。     

α－和β－K_7［SiW_9O_（37）Fe_3（H_2O）_3］·xH_2O的

本文报道了从三缺位杂多阴离子α－和β－ＳｉＷ９Ｏ合成α－和β－［ＳｉＷ９Ｏ３７Ｆｅ３（Ｈ２Ｏ）３］７－的钾盐的方法．ＦＡＢ－负离子质谱表明，阴离子在溶液中主要是以单体形式存在，二聚体微量．阴离子中的配位水分子在甲苯中可被ＳＣＮ等配体取代生成具有特征颜色的配离子．标题化合物具有催化ＰｈＩＯ（亚碘酰苯）环氧化反式－二苯乙烯、苯乙烯、环乙烯生成相应环氧化物的性质．     

钨硅系列三元杂多阴离柱撑阴离子粘土的合成及表征

采用离子交换法将过渡金属离了三元取代钨杂多阴离子引入Ｚｎ２Ａｌ型阴离子粘土层内，得到柱撑水滑石Ｚｎ２Ａｌ（ＯＨ）６－ＳｉＷ９Ｚ３Ｏ４０（Ｚ＝Ｔｉ＾４＋，Ｍｏ＾６＋）及Ｚｎ２Ａｌ（ＯＨ）６－ＳｉＷ９Ｆｅ３（Ｈ２Ｏ２）３Ｏ３７。ＺＲＤ及ＩＲ表明，杂多阴离子引入水滑石层间后，水滑石层内高度为１．０ｎｍ。     

Synthesis, Crystal Structure and Magnetic Property of Disodium Biscarbonato cobaltate(Ⅱ) Tetrahydrate, Na_2Co(CO_3)_2·4H_2O

ＩｎｔｒｏｄｕｃｔｉｏｎＡｓｅａｒｌｙａｓ１８５１,Ｄｅｖｉｌｌｅ［１］ｆｉｒｓｔｉｄｅｎｔｉｆｉｅｄｓｅｖｅｒａｌｄｏｕｂｌｅｃａｒｂｏｎａｔｅｓｏｆｔｈｅｆｏｒｍｕｌＡ２ＣＯ３·ＭＣＯ３·４Ｈ２Ｏ（Ａ＝Ｎａ,ＫａｎｄＭ＝Ｍｇ,Ｎｉ,Ｃｏ）ａｎｄｒｅｐｏｒｔｅｄｔｈｅｐｏｔａｓｓｉｕｍｃｏｍ－ｐｏｕｎｄｓｗｉｔｈａｎｏｒｔｈｏｒｈｏｍｂｉｃｓｙｓｔｅｍ［１］．Ｓｉｎｃｅｅａｃｈｏｆｔｈｅｔｈｒｅｅｃａｒｂｏｎａｔｅｏｘｙｇｅｎｓｉｓａｂｌｅｔｏｐａｒｔｉｃｉｐａｔｅｉｎｃｏｏｒｄｉｎａｔｉｏｎ…     

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%.     

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.     

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.     

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.     

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.     

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.     

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.     

N-Heterocyclic carbene-palladacyclic complexes: synthesis,characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides

N-Heterocyclic carbene-palladacyclic complexes 3 were successfully achieved in a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very low catalyst loadings (0.01?mol%).     

Iodine-mediated oxidative Pictet-Spengler reaction using terminal alkyne as the 2-oxoaldehyde surrogate for the synthesis of 1-aroyl-β-carbolines and fused-nitrogen heterocycles

An efficient iodine-mediated oxidative Pictet-Spengler reaction in dimethyl sulphoxide (DMSO) using terminal alkynes as the 2-oxoaldehyde surrogate for the synthesis of aryl (9H-pyrido[3,4-b]indol-1-yl)methanones is described. The scope of the protocol includes the total synthesis of Fascaplysin, Eudistomins Y₁ and Y₂. The methodology is extended for preparing pyrrolo[1,2-a]-quinoxaline and indolo[1,5-a]quinoxaline derivatives. The utility of 1-aroyl-β-carbolines was demonstrated by performing palladium-catalyzed β-carboline directed ortho-C(sp2)-H functionalization of the phenyl ring with thiomethyl (SMe) group using DMSO as source and for accessing 4-aryl-canthin-6-ones.