三羰基环戊二烯基钼负离子与1，3－二卤丙烷的反应

三羰基环戊二烯基钼负离子与１，３－二卤丙烷在一缩二乙二醇二甲醚介质中反应，生成环卡宾配合物ＣｐＭｏＸ（ＣＯ）＿２ＣＯ（ＣＨ＿２）＿２ＣＨ２（Ｘ＝Ｂｒ，Ｉ）．硅桥连双环戊二烯基三羰基钼负离子与１，３－二卤丙烷顺利地进行类似反应，生成相应的硅桥连双［环卡宾钼配合物］──Ｅ［Ｃ＿５Ｈ＿４ＭｏＸ（ＣＯ）＿２］ＣＯ（ＣＨ＿２）＿２ＣＨ＿２］＿２（Ｅ＝Ｍｅ＿２Ｓｉ，Ｍｅ２ＳｉＳｉＭｅ＿２，Ｍｅ２ＳｉＯＳｉＭｅ＿２）．化合物硅氧硅桥联二茂二钼环卡宾配合物１１的晶体结构经Ｘ射线衍射测定，晶体属三斜晶系，Ｐ１空间群，晶体学数据：ａ＝０．８１８８（１）ｎｍ，ｂ＝１．０４５（３）ｎｍ，ｃ＝２．３２５２（４）ｎｍ，α＝９４．１４（２）°，β＝９４．０９（１）°，γ＝１０２．４８（２）°，Ｖ＝１．９３０６ｎｍ￣３，Ｚ＝２，Ｄ＿ｃ＝１．８５４ｇ／ｃｍ￣３。     

高氯酸铒与甘氨酸和丙氨酸配合物的合成及其晶体结构

在水溶液中合成了高氯酸铒与甘氨酸和丙氨酸混配配合物［Ｅｒ＿２（Ｇｌｙ）＿４）（Ａｌａ）＿２（Ｈ＿２Ｏ）＿４］（ＣｌＯ＿４）＿６·３Ｈ＿２Ｏ，测定了其单晶结构。晶体属三斜晶系，Ｐ１空间群。晶胞参数为ａ＝１．１２８６（５）ｎｍ，ｂ＝１２４４ｂ（２）ｎｍ，ｃ＝０．９４２３（２）ｎｍ，ａ＝７７．６３（２）°，β＝７５２７（２）°，γ＝６４．４５（２）°，Ｖ＝１．１４６６（５）ｎｍ￣３Ｚ＝１，Ｄ＿ｃ＝２．１５４ｇ／ｃｍ￣３。该配合物为链状分子，甘氨酸和丙氨酸的羧基均以桥式与相邻的两个铒离子配位，铒的配位数为８，形成四方反棱柱型配位多面体。     

金属键有机化合物的研究──非对称型η~5－取代环戊二烯基三羰基钼（钨）金属单键化合物的合成及表征

通过η５－Ｒ~１Ｃ＿５Ｈ＿４（ＣＯ）＿３ＭＮａ与η~５－Ｒ~２Ｃ＿５Ｈ＿４（ＣＯ）＿３ＭＮａ（Ｍ＝Ｍｏ，Ｗ）以及η~５－Ｒ~１Ｃ＿５Ｈ＿４（ＣＯ）＿３ＭｏＮａ与η~５－Ｒ~２Ｃ＿５Ｈ＿４（ＣＯ）＿３ＷＮａ在Ｆｅ＿２（ＳＯ＿４）＿３醋酸水溶液作用下的交叉氧化偶联反应，合成了７个新的非对称型金属单键化合物η~５－Ｒ~１Ｃ＿５Ｈ＿４（ＣＯ）－３Ｍｏ─Ｍｏ（ＣＯ）＿３Ｃ＿５Ｈ＿４Ｒ~２－η~５（Ｒ~１，Ｒ~２：Ｃ（Ｏ）Ｍｅ，ＣＯ２Ｅｔ），η５－Ｒ１Ｃ５Ｎ４（ＣＯ）３Ｗ─Ｗ（ＣＯ）３Ｃ５Ｈ４Ｒ２－η５（Ｒ１，Ｒ２：Ｃ（Ｏ）Ｍｅ，ＣＯ２Ｅｔ；Ｈ，ＣＯ２Ｅｔ）和η５－Ｒ１Ｃ５Ｈ４（ＣＯ）３Ｍｏ─Ｗ（ＣＯ）３Ｃ５Ｈ４Ｒ２－η５（Ｒ１，Ｒ２：Ｃ（Ｏ）Ｍｅ，Ｈ；Ｅｔ，Ｃ（Ｏ）Ｍｅ；Ｃ（Ｏ）Ｍｅ，ｎ－Ｂｕ；ＣＯ２Ｍｅ，ｎ－Ｂｕ）．用Ｃ／Ｎ分析、ＩＲ、１ＨＮＭＲ和ＭＳ表征了它们的结构，并对该氧化偶联反应的特点进行了讨论．     

呋喃醛双缩二氨基硫脲腙的合成和结构测定

由ＣＳ＿２，Ｎ＿２Ｈ＿４和Ｃ＿４Ｈ＿３ＯＣＨＯ合成Ｃ＿（１１）Ｈ＿（１０）Ｎ＿４Ｏ＿２Ｓ·１／２ＤＭＦ，Ｍ＿ｒ＝２９８．７９，橙黄针状晶体，三斜晶系，空间群Ｐ１，ａ＝８．９１２（３），ｂ＝９．９８９（３），ｃ＝１６．１０７（４），ａ＝８３．６１８（６），β＝８７．１０５（５），γ＝８６．１１５（３）°，Ｖ＝１４２０．４，Ｚ＝４，Ｄ＿ｘ＝１．３９７ｇ／ｃｍ￣３，λ（ＭｏＫα）＝０．７１０７３，μ＝２．１７０ｃｍ￣（－１），Ｆ（０００）＝６１６。３２２６个可观察的独立反射（Ｉ＞３σ（Ｉ）使结构顺利解出，并精修到Ｒ＝０．０４８，△ρ＿（ｍａｘ）＝０．２８６。单晶体结构分析表明不对称单位含有二个非结晶学对称相关的独立分子和一个溶剂分子ＤＭＦ，通过ＤＭＦ中的ｏ原子和亚胺Ｈ形成Ｎ－Ｈ…Ｏ…Ｈ－Ｎ类型双氢键，使两个分立分子缔合一起而自成独立的结构单元。     

大环硫氮冠醚金属配合物的研究──Ⅱ．1，4，10，13－四硫－7，16－二氮杂环十八烷硝酸铜配合物的合成、结构及立体化学

作为系统研究大环硫氮杂冠醚配合物的第二部分，合成了四硫二氮杂环十八冠的硝酸铜配合物［Ｃｕ（Ｃ＿（１２）Ｈ＿（２６）Ｎ＿２Ｓ＿４）］·（ＮＯ＿３）＿２·Ｈ＿２Ｏ，测定了元素分析和红外光谱。利用Ｘ－射线衍射分析方法，测定其晶体结构。晶体学参数ａ＝１７．５７６（４），ｂ＝１１．７５３（３），ｃ＝１０．４８５（５），Ｖ＝２１６３．９（７），Ｚ＝４，Ｄ＿ｃ＝１．６３２ｇ／ｃｍ￣３，Ｆ（０００）＝１１０８，μ＝１．４２ｃｍ￣（－１）（ＭｏＫα），最终偏离因子Ｒ＝０．０３２和Ｒｗ＝０．０３４。晶体测定结果表明：有杂原子组成的四硫二氮大环冠醚比含氧冠醚有更大的柔变性；四硫二氮大环冠醚与Ｃｕ离子配位前后，大环的构象发生了变化。     

三卤代锡钨（钼）双核化合物的制备和晶体结构

ＣｐＭ（ＣＯ）３ＳｎＰｈ３和ＣｐＭ（ｃｏ）３ｓＮｐＨ２ｘ（Ｃｐ＝Ｃ５Ｈ４ＣＨ３，Ｃ５Ｈ４ＣＯＣＨ３；Ｍ＝Ｍｏ，Ｗ；Ｘ＝Ｃｌ，Ｂｒ）与ＨＣｌ或ＨＢｒ发生取代反应，得到三氯、三溴以及混合三卤代锡钨（钼）双核化合物，并经元素分析、＾１Ｈ ＮＭＲ、ＩＲ表征。化合物Ｃｌ３ＳｎＷ（ＣＯ）３Ｃ５Ｈ４ＣＯＣＨ３的晶体属单斜晶系，空间群为Ｐ２１／ｃ，ａ＝０．７６８６（３）ｎｍ，ｂ＝１．２６２２（２）ｎｍ，ｃ＝１．６     

钕（Ⅲ）与对－氨基苯甲酸、邻菲咯啉混配配合物的晶体结构和激光拉曼光谱

报道了钕与对－氨基苯甲酸、邻菲咯啉的配合物［（Ｎｄ（ｐ－ＡＢＡ）４·２Ｐｈｅｎ］Ｈ３Ｏ·２Ｐｈｅｎ的合成。测定了它的结构和激光拉曼光谱。配合物属单斜晶系，空间群为Ｃ２／ｃ，ａ＝１９０６７（５）ｎｍ，６ｂ＝１，９１９２（３）ｎｍ，ｃ＝２．０１９０（４）ｎｍ，Ｂ＝２１１７．２５（２）℃，Ｖ＝６．５６８（５）ｎｍ３Ｍ＝１４２８．６３，ｚ＝４，Ｄｘ＝１．４５ｇ·ｃｍ－３。钕离子的配位数为１０，钕原子周围的配位原子形成畸变的四帽三角棱柱体。     

吡啶－2，6－二甲酸镧钇异核配合物的合成及晶体结构

合成了吡啶－２，６－二甲酸镧钇异核配合物晶体。元素分析结果表明，化学式为ＬａＹ（ＨＤＰＡ）＿２·（ＤＰＡ）＿２．１２Ｈ＿２Ｏ，ＤＰＡ为吡啶－２，６－二甲酸根。用Ｘ射线衍射法测定了配合物的单晶结构，其结构式为［ＬａＹ（ＨＤＰＡ）＿２（ＤＰＡ）＿２（Ｈ＿２Ｏ）＿４」·８Ｈ＿２Ｏ，属单斜晶系，Ｐ２＿１／ａ空间群。晶胞参数：ａ＝１．２９７５（４）ｎｍ，ｂ＝１．１２６６（３）ｎｍ，ｃ＝１．４０７９（３）ｎｍ；β＝１０２；１５（２）°，Ｖ＝２．０１１９０（１）ｎｍ￣３，Ｚ＝４，Ｄｃ＝１．８３ｇ／ｃｍ￣３，稀土离子的配位数为９，其配位多面体为扭曲的三冠三角棱柱体。     

Ln(NO_3)_3·C_(26)H_(38)N_2O_4(Ln=La、Ce)配合物的合成和La(NO_3)_3·C_(26)H_(38)N_2O_4·CH_3CN的晶体结构

合成了２个新的希土冠醚配合物Ｌｎ（ＮＯ３）３·Ｃ２６Ｈ３８Ｎ２Ｏ４（Ｌｎ＝Ｌａ、Ｃｅ；Ｃ２６Ｈ３８Ｎ２Ｏ４＝１，７，１０，１６－四氧－４，１３－二氮杂－Ｎ，Ｎ′－二苄基环十八烷）。通过元素分析，红外光谱，拉曼光谱及其１Ｈ核磁共振谱进行表征。用四圆衍射仪测定了Ｌａ（ＮＯ３）３·Ｃ２６Ｈ３８Ｎ２Ｏ４·ＣＨ３ＣＮ的晶体结构。晶体属三斜晶系，Ｐ１空间群，晶胞参数：ａ＝１．２８６９（４）ｎｍ，ｂ＝１．５８６８（６）ｎｍ，ｃ＝０．９１４７（２）ｎｍ；α＝１０１．８９（２）°，β＝１０５．３８（２）°，γ＝７１．９６（３）°；Ｚ＝２。ｄｃａｌｄ．＝１．５８ｇ·ｃｍ－３，μ（ＭｏＫα）＝１３．２５ｃｍ－１。中心镧离子与冠醚配体中的４个氧原子和２个氮原子配位，３个硝酸根中的６个氧原子也与Ｌａ３＋配位，形成配位数为１２的配合物。     

镧系四元混合阴离子配合物[Ln(CCl3COO)2(CH3COO)(Phen)(H2O)]2的合成与晶体结构

在水乙醇溶液中合成了３ 种四元混合阴离子配合物， 用元素分析、ＩＲ、ＵＶ 及单晶Ｘ射线衍射进行了表征。［Ｌａ（ＣＣｌ３ＣＯＯ）２（ＣＨ３ＣＯＯ）（Ｐｈｅｎ）（Ｈ２Ｏ）］２·２ＤＭＦ 晶体属三斜晶系， Ｐ１ 空间群， 晶胞参数：ａ＝ １－２５１０（４） ｎｍ ， ｂ＝ １－３４６０（５） ｎｍ ， ｃ ＝ １－０３４３（３） ｎｍ ， α＝ １０２－４７（３）°， β＝ １０２－３４（２）°， γ＝ １１３－８２（２）°， μ（ＭｏＫα） ＝ ２０．４７ ｃｍ －１ ， Ｚ＝ １， Ｄｃ＝ １－８００ ｇ·ｃｍ － ３ ， Ｆ（０００） ＝ ７８０－００。稀土配合物中醋酸根以桥联方式配位， 三氯醋酸根则有２ 种配位方式， 在二者共同参与配位的体系中呈现出丰富的配位模式。     

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%.     

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.     

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.     

Selective syntheses of 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones via temperature-dependent Rh(II)-carbenoid-mediated 2H-azirine-ring expansion

The Rh(II)-catalyzed reaction of 2-carbonyl-substituted 2H-azirines with ethyl 2-cyano-2-diazoacetate or 2-diazo-3,3,3-trifluoropropionate provides an easy access to 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones. These compounds can be selectively prepared from the same starting material using temperature as the only varied parameter. The 2-azabuta-1,3-diene intermediate, a common precursor for both heterocyclic products, isomerizes into 2H-1,3-oxazine under kinetic control, while 1H-pyrrol-3(2H)-one is the sole product of the reaction at elevated temperatures. According to DFT-calculations a one-atom oxazine ring contraction involving ring-opening to a 2-azabuta-1,3-diene intermediate, followed by a 1,5- and 1,2-prototropic shift leads to the consecutive formation of imidoylketene and azomethine ylide, which then further undergo cyclization to the pyrrole derivative.     

Copper catalyzed/mediated synthetic methodology for ebselen and related isoselenazolones

Scope of the copper catalyzed/mediated selenium-nitrogen coupling reaction has been studied for the synthesis of isoselenazolones. It is noticed that the 2-chloro, 2-bromo-, and 2-iodo-aryl amides substrates can be exploited in the selenium-nitrogen coupling reaction by employing 25-100 mol % of CuI/1,10-phenanthroline (L) and potassium carbonate as a base in DMF. Furthermore, electron rich 2-chloro-arylamides also underwent selenium-nitrogen coupling reaction to give biologically important selenium-nitrogen heterocycles. Also, copper-catalyzed selenium-nitrogen coupling reaction has been meticulously applied for the synthesis of diaryl diselenides having methoxy, amine, and amide functionality from respective aryl iodides in the presence of stoichiometric amount of succinimide as an external Se-N coupling partner.     

Knoevenagel condensation catalyzed by novel Nmm-based ionic liquids in water

A series of novel N-methyl morpholine (Nmm) based ionic liquids with 1,2-propanediol group were synthesized and used as catalysts for Knoevenagel condensation at room temperature in water. Under the effect of the catalyst, various aldehydes or aliphatic ketones could react with a wide range of activated methylene compounds well, including malononitrile, alkyl cyanoacetate, cyanoacetamide, β-diketone, barbituric acid, 2-arylacetonitrile and thiazolidinedione. Furthermore, most of the products could be separated just by filtrating and washing with water. Additionally, the catalyst is recyclable and applicable for the large-scale synthesis.     

Construction of polyheterocyclic spirotetrahydrothiophene derivatives via sulfa-Michael/aldol cascade reaction

A series of polyheterocyclic spirotetrahydrothiophene derivatives were obtained in moderate to excellent yields via a catalyst-free sulfa-Michael/aldol cascade reaction of chalcones 1 and commercially available 1,4-dithiane-2,5-diol 2 under mild conditions. We also present the first asymmetric sulfa-Michael/aldol cascade reaction of chalcones 1 and commercially available 1,4-dithiane-2,5-diol 2 with moderate to good enantioselectivities catalyzed by readily available chiral phase-transfer catalysts (PTCs).     

Suzuki-Miyaura reactions of the soluble guanylate cyclase inhibitor NS2028: a non-product specific route to C-8 substituted analogues

Both soluble guanylate cyclase (sGC) inhibitors ODQ 1 and NS2028 2 are synthesized via improved protocols. In the former case treating 3,4-dihydroquinoxalin-2(1H)-one oxime 8, which can be prepared in two steps from 1,2-benzenediamine, with 1,1′-carbonyldiimidazole (CDI) gives the dihydro-ODQ 10 that in the presence of KMnO₄ oxidises to give ODQ 1 in an overall yield of 46% starting from 1,2-benzenediamine. In the latter case, the synthesis affords NS2028 2 from 2-amino-4-bromophenol 3 in three steps with an overall yield of 85% and avoids the need for chromatography. Furthermore, Suzuki-Miyaura reaction conditions are described that enable the preparation of 8-aryl and 8-heteroaryl derivatives of NS2028 directly from NS2028 2. Finally, demethylation of the 8-(methoxyphenyl) substituted analogues afforded the 8-(hydroxyphenyl) derivatives 40-42. All new products are fully characterised.