双（取代环戊二烯基）二氯化锆的晶体结构分析

用Ｘ－射线晶体结构衍射法测定了双［１－苄基－１－乙基丙基环戊二烯基］二氯化锆［η５－Ｃ５Ｈ４Ｃ（Ｃ２Ｈ５）２ＣＨ２Ｃ６Ｈ５］２ＺｒＣｌ２（Ｉ）及（１，２－二异丁基－１，２－甲基－乙基桥联）双环戊二烯基二氯化锆［η５－Ｃ５Ｈ４Ｃ（ＣＨ３）（Ｃ４Ｈ９－ｉ）Ｃ（ＣＨ３）（Ｃ４Ｈ９－ｉ）Ｃ５Ｈ４－η５］ＺｒＣｌ２（Ⅱ）的结构。二者皆为单斜晶系，（Ｉ）的空间群为Ｐ２／ｎ，ａ＝１２．５８２（３），ｂ＝７．９９２（２），ｃ＝１４．９７９（３）Ａ，β＝１０１．６８（１）°，Ｖ＝１４７４．９（９）Ａ３，Ｍｒ＝６１２．８４，Ｚ＝２，Ｄｘ＝１．３８ｇ／ｃｍ３，μ＝５．６９ｃｍ（－１），Ｆ（０００）＝６４０，Ｒ＝０．０３３，Ｒω＝０．０３６。（Ⅱ）的空间群为Ｃｃ，ａ＝１３．３０９（３），ｂ＝９．５９１（１），ｃ＝１６．４４９（８）Ａ。β＝４．８３（３）°，Ｖ＝２０９．２（２）Ａ３，Ｍｒ＝４５８．６３，Ｚ＝４，Ｄｘ＝１．４５６ｇ／ｃｍ３，μ＝７．７７ｃｍ（－１），Ｆ（０００）＝９５２，Ｒ＝０．０５１，Ｒω＝０．０６１。化合物（Ｉ）以重叠式存在，两个苄基处于反式。晶体（Ⅱ）以交叉式存在，甲基、异丁基以反式构象存在。     

两个异亚砂基乙酰丙酮—N—芳基亚胺Pd（Ⅱ）配合物的合成 …

合成了两个异亚硝基乙酰丙酮－Ｎ－芳基亚胺的Ｐｄ（Ⅱ）配合物,ＰｄＣｌ（Ｃ６Ｈ５－ＩＡＩ）（Ｃ６Ｈ５ＮＨ２）（１）和ＰｄＣｌ（ｐ－ＣＨ３Ｃ６Ｈ４－ＩＡＩ）（ｐ－ＣＨ３Ｃ６Ｈ４ＮＨ２）（２）,并测定了配合物１的晶体结构。配合物１晶体属正交晶系,空间群为Ｐｃａ２１,晶胞参数ａ＝１．８５８７（４）ｎｍ,ｂ＝０．９３８０（２）ｎｍ,ｃ＝２．１２３７（４）ｎｍ,Ｚ＝８,Ｆ（０００）＝１７６０,μ＝１．１６０ｍ     

[（C5H4CH3）2HoN4cpH]2.[（C5H4CH3）（C5H5）HoN4CPh]2的合成和晶体结构2

（Ｃ５Ｈ４ＣＨ３）３Ｈｏ和（Ｃ５Ｈ４ＣＨ３）２Ｈｏ（Ｃ５Ｈ５）与５－本基四唑在ＴＨＦ中反应，得到了复合产物「（Ｃ５Ｈ４ＣＨ３）２ＨｏＮ４ＣＰｈ」２．「（Ｃ５Ｈ４ＣＨ３）（Ｃ５Ｈ５）ＨｏＮ４ＣＰｈ」２，该晶体属三斜晶系，Ｐ１空间群，晶胞参数为ａ＝９．３８６（３），ｂ＝１３．０７１（３），ｃ＝１６．５７１（２）Ａ，α＝８６．９０（１），β＝７４．６１（２），γ＝７７．３０（２）°，Ｖ＝１９１２．８（８     

RS—联萘酚膦酰胺晶体结构及与其S体分子力学计算结果的比较

测定了Ｏ，Ｏ（２，２＇－联萘基）－Ｎ－（α－苯基乙基）膦酰胺ＲＳ体与乙醇形成的分子化合笺晶体结构。晶体学数据为：Ｃ２８Ｈ２２ＮＯ３Ｐ．Ｃ２Ｈ５ＯＨ，Ｍｒ＝４９７．５，单斜晶系，Ｐ２１空间群，ａ＝９．３５９（２），ｂ＝１２．８０６（３），ｃ＝１１．６４１（Ａ），β＝１１１．６２（３）°，ｚ＝２，ｖ＝１２９４，０（５）ａ＾３，Ｄｃ＝１．２７７ｇ／ｃｍ＾３，ＭｏＫａ（λ＝０．７１０７３Ａ）射线，μ＝１．     

[NH4（15—C—5）2][C2（SCN）5配合物的晶体和分子结构

用凝胶法合成了标题化合物［ＮＨ４（１５－Ｃ－５）２］［Ｃｄ２（ＳＣＮ）５］（１５－Ｃ－５＝Ｃ１０Ｈ２０Ｏ５）的晶体，并对其进行了红外光谱，元素分析等各项物理性质的测试，并经Ｘ射线单晶结构分析得到了配合物的全部晶体学数据：Ｍｔ＝９７３．７８，正交晶系，空间群Ｐｎｍａ，晶胞参数α＝１０．５０７（１）Ａ，ｂ＝１６．５８４（２）Ａ，ｃ＝２３．４９４（２）Ａ，Ｖ＝４０９３．８（３）Ａ＾３，Ｚ＝４，Ｄｃ＝２．     

新型含钌异核过渡金属簇合物的合成及其结构表征

利用金属交换法合成了四个新的含钌手性过渡金属簇合物［ＭＲｕＣｏ（ＣＯ）_８（μ_３－Ｓｅ）［η_５－Ｃ_５Ｈ_４Ｃ（Ｏ）Ｒ｝］（ １ Ｍ＝ Ｍｏ, Ｒ＝ ＯＥｔ; ２ Ｍ＝ Ｗ, Ｒ＝ ＯＥｔ; ３ Ｍ＝ Ｍｏ, Ｒ＝ ＣＨ_２ＣＨ_２ＣＯＯＭｅ; ４ Ｍ＝ Ｗ, Ｒ＝ ＣＨ_２ＣＨ_２ＣＯＯＭｅ）,并用红外、核磁、元素分析测试结果进行表征,对簇合物１进行了单晶结构测定,晶体属单斜晶系,Ｐ２_１／ｎ空间群,晶胞参数ａ＝１０．１６８（２）Ａ,ｂ＝９．０１８（２）Ａ,ｃ＝２３．１２１（３）Ａ,β＝９２．５０（１）°,Ｚ＝４。     

C6H5C2H4Co(salen)H2O的晶体结构和性质研究

合成了标题配合物Ｃ６Ｈ５Ｃ２Ｈ４ＣＯ（ｓａｌｅｎ）Ｈ２Ｏ，并经元素分析、红外、紫外－可见光谱、差热－热重分析和循环伏安法表征．测定了晶体结构，其中轴向的Ｃｏ—Ｃ和Ｃｏ－Ｏ键长分别为１．９６２（１４）和２．２０９（９）Ａ，其Ｃｏ—Ｃ键是目前ＲＣｏ（ｓａｌｅｎ）Ｈ２Ｏ中最短的，晶体属四方晶系，空间点群为Ｐ－４２（１）Ｃ，品胞参数如下：ａ＝２４．７８９（９），ｂ＝２４．７８９（９），ｃ＝７．０６０（７）Ａ，β＝９０．００°，Ｖ＝４３３８．９Ａ３，Ｚ＝８．     

Cu2I2(PPh3)3.DMF的合成和晶体结构

Ｃｕ２Ｉ２（ＰＰｈ３）３·ＭＤＦ（Ｐｈ＝Ｃ６Ｈ５,ＤＭＦ＝ＨＣＯＮ（ＣＨ３）２是通过Ｗ２Ｓ４（Ｓ２ＣＮ－（ＣＨ２ＣＨ２ＯＨ）２）２,ＰＰｈ３和ＣｕＩ在ＣＨ２Ｃｌ２和ＤＭＦ为溶剂,在室温条件下合成的晶体产物。其窨群为Ｐ２１／Ｃ,晶胞参数：Ｃ５７Ｈ５２Ｃｕ２Ｉ２ＮＯＰ３,α＝１５．８６３（５）,ｂ＝１９．６１９（７）,ｃ＝１８．２３２（４）,Ａ,β＝１０９．５３（２）°,Ｖ＝５３４８（３）Ａ＾３,Ｚ＝     

〔NH_4（15－C－5）_2〕〔Cd_2（SCN）_5〕配合物的晶体和分子结构

用凝胶法合成了标题化合物［ＮＨ４（１５－Ｃ－５）２］［Ｃｄ２（ＳＣＮ）５］（１５－Ｃ－５＝Ｃ１０Ｈ２０Ｏ５）的晶体，并对其进行了红外光谱、元素分析等各项物理性质的测试，并经Ｘ射线单晶结构分析得到了配合物的全部晶体学数据：Ｍｒ＝９７３．７８，正交晶系，空间群Ｐｎｍａ，晶胞参数ａ＝１０．５０７（１）Ａ，ｂ＝１６．５８４（２）Ａ，ｃ＝２３．４９４（２）Ａ，Ｖ＝４０９３．８（３）Ａ３，Ｚ＝４，Ｄｃ＝２．５８０ｇ／ｃｍ３，μ＝１３．３１ｃｍ（－１），Ｆ（０００）＝１９６８，Ｒ＝０．０７０，Ｒω＝０．０８５。结构分析结果表明，配阳离子是由一个ＮＨ４＋和两个１５－Ｃ－５组成的，ＮＨ４＋没有进入１５－Ｃ－５空腔内，而是位于两个１５－Ｃ－５之间，呈夹心结构；配阴离子是以［Ｃｄ２（ＳＣＮ）５］为单元的阴离子长键，其中一组ＳＣＮ－被四个Ｃｄ离子共享，其余两组ＳＣＮ－被两个Ｃｄ离子共享，呈变形八面体构型。配阳离子［ＮＨ４（１５－Ｃ５）２］＋和配阴离子［Ｃｄ２（ＳＣＮ）５］－间靠静电力结合成配合物晶体。     

[C5H4C(CH3)2CH2CH=CH2]Sm(OH)Cl·2MgCl2·4THF的晶体结构分析

用Ｘ－射线晶体结构衍射法测定了［Ｃ５Ｈ４Ｃ（ＣＨ３）２ＣＨ２ＣＨ＝ＣＨ２］Ｓｍ（ＯＨ）Ｃｌ·２ＭｇＣｌ２·４ＴＨＦ的晶体结构。它属三斜晶系,空间群为Ｐ＾－１,ａ＝１０．７７３（２）,ｂ＝１２．８３６（３）,ｃ＝１５．４７８（３）Ａ,ａ＝１１１．４６（３）,β＝１０７．７１（３）,γ＝９２．５４（３）°,Ｖ＝１８６８（１）Ａ＾３,Ｍｒ＝８２７．９１,Ｄｘ＝１．４７２ｇ／ｃｍ＾３,μ＝２．０００６ｍｍ     

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.