钾（Ⅰ）（4‘,5’—二溴苯并—15—冠—5）配合物的研究

在丙酮介质中合成了４′，５′－二溴苯并－１５－冠－５分别与碘化钾和硫氰化钾的两种新型固体配合物。元素分析表明配合物的化学组成为Ｋ（Ｂｒ２Ｂｌ５Ｃ５）Ｘ（Ｘ＝Ｉ＾－或ＮＣＳ＾－）。通过摩尔电导、红外光谱、Ｘ－射线粉末衍射分析对配合物进行了表征。从而证明，钾（Ｉ）离子不仅容易与４′，５′－二溴苯并－１５－冠－５形成常见的１：２夹心式配合物，而且还能生成稳定的１：１型固体配合物。     

钾（Ⅰ）（4＇，5＇－二溴苯并－15－冠－5）配合物的研究

在丙酮介质中合成了４＇，５＇－二溴苯并－１５－冠－５分别与碘化钾和硫氰化钾的两种新型固体配合物。元素分析表明配合物的化学组成为Ｋ（Ｂｒ＿２Ｂ１５Ｃ５）Ｘ（Ｘ＝Ｉ￣－或ＮＣＳ￣－）。通过摩尔电导、红外光谱、Ｘ－射线粉末衍射分析对配合物进行了表证。从而证明，钾（Ⅰ）离子不仅容易与４＇，５＇－二溴苯并－１５－冠－５形成常见的１：２夹心式配合物，而ｎ还能生成稳定的１：１型固体配合物。     

2,6—双（1′—苯基—3′—甲基—5′—氧代—4′—甲酰吡唑）吡啶稀土配合物的合成

在乙醇－水溶液中合成了１４种２，６－双（１′－苯基－３′－甲基－５′－氧代－４′－甲酰吡啶）吡啶稀土配合物，元素分析确定其化学组成的ＲＥ２Ｌ３．ｎＨ２Ｏ并用紫外可见光谱、红外光谱，核磁共振谱，热分析，荧光光谱，摩尔电导等进行了表征。     

稀土钼钒磷杂多酸半菁盐的合成,表征和催化性能

用降解法首次制得Ｄａｗｓｏｎ结构的稀土钼钒磷酸钾。通过它们与溴化（Ｅ）－１－丁基－４－［２－（４－二甲氨基苯）乙烯基］吡啶反应，制备了种未见文献报道的具有下列组成的新型稀土杂多配合物的有机衍生物，研究了其红外、紫外，可见光谱、Ｘ射线光电子能谱、Ｘ射线粉末衍射及热重－差热谱，以镧配合物为催化剂，对乙酸与正丁醇、异戊醇的酯化反应进行了初步研究。     

2，6－双（1′－苯基－3′－甲基－5′－氧代－4′－甲酰吡唑）吡啶稀土配合物的合成与表征

在乙醇－水溶液中合成了１４种２，６－双（１′－苯基－３′－甲基－５＇－氧代－４＇－甲酰吡唑）吡啶稀土配合物。元素分析确定其化学组成为ＲＥ＿２Ｌ＿３·ｎＨ＿２Ｏ，并用紫外可见光谱、红外光谱、核磁共振谱、热分析、荧光光谱、摩尔电导等进行了表征。     

两亲性四（3—苯基—4—苯甲酰基—5—异恶唑酮）合稀土酸十六…

合成了４种两亲性的３－苯基－４－苯甲酰基－５－异恶唑酮合稀土酸十六烷基吡啶配合物：Ｌｎ（ＰＢＩ）４。ＨＤＰ（Ｌｎ＝Ｓｍ，Ｅｕ，Ｔｂ，Ｄｙ）。用元素分析，红外光谱，差热－热重谱，紫外－可见光谱对其进行了表征。     

锑（Ⅲ）－PMBP配合物极谱波的研究

锑（Ⅲ）－ＰＭＢＰ配合物极谱波的研究王曙，吴永强，廖占和（四川轻化工学院化工系６４３０３３）关键词锑，配合物吸附波，１－苯基－３－甲基－４－苯甲酰基吡唑啉酮－５。多种有机试剂可用于锑配合物极谱催化波的测定￣［１－２］。１－苯基－３－甲基－４－苯甲酰基...     

铕(Ⅲ)的双亚砜混配配合物的合成、表征及其荧光光谱

本文合成了１，３－双（苯基亚砜）丙烷，１，４双（苯基亚砜）丁烷与１，１０－菲罗啉，２，２’－联吡啶的铕（Ⅲ）配合物，并通过元素分析、红外光谱、紫外光谱、摩尔电导和热分析对该系列配合物进行了表征，并测量和分析了有关五个配合物的荧光光谱．     

1,2—双（1‘—苯基—3’—甲基—5‘—氧代吡唑—4’—基）—1,2…

用萃取法合成了１５种１，２－双（１＇－苯基－３＇－甲基－５＇－氧代吡唑－４＇－基）－１，２苯二酮（ＢＰＭＯＰＰ，简作Ｈ２Ｌ）稀土配合物。元素分析确定其化学组成为ＲＥ２Ｌ３·ｎＨ２Ｏ。通过电子光谱、红外光谱、核磁共振谱、热谱、摩尔电导等进行了表征，并讨论了配合物的性质。     

三[α—噻吩甲酰三氟丙酮]—9—[烷基亚胺基4,5—二氮杂芴[合铕（Ⅲ）…

报道了以α－噻吩三氟丙酮（ＨＴＴＡ）为第一配体，９－丁基亚胺基－４，５二氮杂芴［Ｌ１］和９－十八烷基亚胺基－４，５－二氮杂易［Ｌ２］为第二配体，与铕（Ⅲ）的两种新型二嗜性的强荧光配合物的合成，并用元素分析、紫外光谱、红外光谱、小角Ｘ射线衍射、荧光光谱和差热－热重谱对其进行了表征。得到了其组成和结构信息。     

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.     

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.     

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.     

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.     

Microwave-assisted copper-catalyzed stereoselective ring expansion of three-membered heterocycles with α-diazo-β-dicarbonyl compounds

Microwave-assisted copper-catalyzed ring expansions of three-membered heterocycles with α-diazo-β-dicarbonyl compounds were investigated. Thiiranes generated 3-acyl-5,6-dihydro-1,4-oxathiines in the presence of copper sulfate and trans-3-acyl-5,6-dihydro-1,4-oxathiines as stereospecific products for 1,2-disubstituted cis-thiiranes through an intramolecular S_N2 process. Oxiranes gave rise to 2-acyl-5,6-dihydro-1,4-dioxines under the catalysis of copper hexafluoroacetylacetonate and cis-3-acyl-5,6-dihydro-1,4-dioxines as stereospecific products for 1,2-disubstituted cis-oxiranes via an intimate ion-pair mechanism. The current method provides a direct and simple strategy in efficient preparation of 3-acyl-5,6-dihydro-1,4-oxathiines and 2-acyl-5,6-dihydro-1,4-dioxines, important agents in medicinal and agricultural chemistry, from readily available thiiranes and oxiranes, respectively.     

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.     

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%).