（R）—N—乙酰四氢噻唑—2—硫酮—4—羧酸与醇的反应

（Ｒ）－Ｎ－乙酰四氢噻唑－２－硫酮－４－羧酸与醇反应，在ＳＯＣｌ２存在下得到乙酸酯及四氢噻唑－２－硫酮－４－羧酸酯；在碳酸钾存在下得到乙酸酯及四氢噻唑－２－硫酮－４－羧酸；在二环己基碳二亚胺（ＤＣＣ）存在下得到缩水产物Ｎ－乙酰四氢噻唑－２－硫酮－４－羧酸酯。     

1,2-双(四甲基环戊二烯基)四甲基二硅烷与六羰基钼的反应

１,２－双（四甲基环戊二在）四甲基二硅烷与正丁基锂作用生成（四甲基二硅撑）双（四甲基环戊二烯基负离子盐）,后者随即与六羰基钼反应形成１,１＇－（四甲基二硅撑）双（四甲基环戊二烯基钼负离子盐）－－（Ｍｅ２ＳｉＳｉＭｅ２）〖Ｍｅ４ＣｐＭｏ（ＣＯ）３－Ｌｉ＾＋〗２（１）,１与冰醋酸作用,随即分别与ＣＣＩ４,ＮＢＳ及Ｉ２反应,生成相应的钼卤化合物（Ｍｅ２ＳＩＳｉＭｅ２）〖Ｍｅ４ＣｐＭｏ（ＣＯ）３Ｘ〗２〖Ｘ     

四溴代对苯二甲酸根桥联的双核钴（II）配合物的合成和表征

本文报道了四种新的双核钴（Ⅱ）配合物，即［Ｃｏ２（４Ｂｒ－ＴＰＨＡ）（Ｌ）４］（ＣｌＯ４）（４Ｂｋ－ＴＰＨＡ＝四溴代对苯二甲酸根阴离子，Ｌ＝１，１０－菲咯啉（ｐｈｅｎ）（１），５－硝基－１，１０－菲咯啉（ＮＯ２－ｐｈｅｎ）（２），２，２＇－联吡啶（ｂｐｙ）（３）和４，４＇－二甲基－２，２＇－联吡啶（Ｍｅ２ｂｐｙ）（４））的合成的表征，基于ＩＲ光谱、元素分析、电导测量等方法推定配合物具有四溴代对苯二     

（1，1－二硝基－2－叠氮基乙基）苯的合成及其热稳定性

（１，１－二硝基－２－叠氮基乙基）苯的合成及其热稳定性阎红，管晓培，陈博仁（北京工业大学化学与环境工程学系北京１０００２２）（北京理工大学化工与材料学院北京）关键词　叠氮化合物，偕二硝基化合物，含能材料有机叠氮化合物是一类重要的含能材料，近年来受到广...     

N－（2－环戊酮基丙酰基）－及N－（2－环己酮基丙酰基）－四氢噻唑－2－硫酮的合成及其醇解与胺解

以碘化－Ｎ－甲基－２－氯吡啶盐为缩合剂，在三乙胺存在下由３－（２－环戊酮基）丙酸及３－（２－环己酮基）丙酸分别同四氢噻唑－２－硫酮反应，得到新化合物Ｎ－（２－环戊酮基内酰基）四氢噻唑－２－硫酮（２ａ）及Ｎ－（２－环己酮基丙酰基）四氢噻唑－２－硫酮（２ｂ），产率分别为５２．９％和５１．０％，２ａ，ｂ分别同甲醇、乙醇反应得到相应的３－（２－环戊酮基）丙酸酯３ａ，ｂ及３－（２－环己酮基）丙酸酯３ｃ，ｄ，３ａ～ｄ的产率为７５～８７％；２ａ、ｂ分别同胺反应得到３－（２－环戊酮基）内酰胺４ａ、ｂ及３－（２－环己酮基）内酰胺４ｃ、ｄ，４ａ～ｄ产率为７８～９３％。     

具有生物活性的有机硅化合物的研究（XIII）—1—（O,O—二烷基…

合成了９种１－（Ｏ，Ｏ－二烷基－二硫代磷酸酯）亚甲基－２，８，９－三氧杂－５－氮杂－１－硅杂三环－［３，３，３，０＾１，５］十一烷。合成方法简单，易于后处理，经元素分析、ＩＲ、＾１Ｈ ＮＭＲ、ＭＳ确定了新化合物的结构，并对其进行了生物活性的研究。     

三环己基锡O,O‘—二（4—氯苯基）—二硫代磷酯酯和二丁基锡双（O,O’—二…

三环己基锡Ｏ，Ｏ’－二（４－氯苯基）二硫代磷酸酯（Ｉ），Ｃ３０Ｈ４１Ｃｌ２（Ｏ２ＰＳ２Ｓｎ，Ｍｒ＝７１８．３６，单斜晶系，Ｐ２１／ｎ，ａ＝１６．１５１（２），ｂ＝９．４１５９（１），ｃ＝２２．９８７（３），Ａ，β＝１０５．６９（１）°，Ｚ＝４，Ｄｃ＝１．４１８ｇ．ｃｍ＾－３，Ｒ＝０．０６３；二丁基锡双（Ｏ，Ｏ’－二（４－甲基苯基）二硫代磷酯酯（Ⅱ），Ｃ３６Ｈ４６Ｏ４Ｐ２Ｓ４Ｓｎ，Ｍｒ＝８５１．６６     

四溴代邻苯二甲酸根桥联的双核钴（Ⅱ）配合物的合成和表征

合成和表征了４种以四溴代邻苯二甲酸根阴离子（４Ｂｒ－ＰＨＴＨ）桥联、以１，１０－菲咯啉（ｐｈｅｎ），５－硝基－１，１０－菲咯啉（ＮＯ_２－ｐｈｅｎ），２，２′－联吡啶（ｂｐｙ）和４，４′－二甲基－２，２′－联吡啶（Ｍｅ_２ｂｐｙ）端接的双核钴（Ⅱ）配合物［Ｃｏ_２（４Ｂｒ－ＰＨＴＨ）（Ｌ）_４］（ＣｌＯ_４）（Ｌ＝ｐｈｅｎ（ｌ），ＮＯ_２－ｐｈｅｎ（２），ｂｐｙ（３），Ｍｅ_２ｂｐｙ（４））。基于ＩＲ光谱、元素分析、电导测量等方法推定配合物具有四溴代邻苯二甲酸根桥联结构和Ｃｏ（Ⅱ）离子具有畸变的八面体配位环境。进行了配合物变温磁化率（７５～３００Ｋ）的测定，其数据已用从自旋哈密顿符导出的磁方程拟合，求得交换参数Ｊ＝－０．８７ｃｍ~（－１）（１），－０．８４ｃｍ~（－１）（２），－０．８２ｃｍ~（－１）（３），－０．８５ｃｍ~（－１）（４），表明金属离子间有弱的反铁磁性自旋交换相互作用。     

N—（2‘—羟基）苄基—乙（丙）醇胺合锌酸位热力学及其催化酯水 …

用ｐＨ电位滴定法研究了配体Ｎ－（２’－羟基）苄基乙醇胺（ＨＬ＾１）和Ｎ－（２－羟基苄基）－丙醇胺（ＨＬ＾２）与Ｚｎ（Ⅱ）离子２：１配位热力学,合成了它们的配合物。在ｐＨ＝７～９（５０ｍｍｏｌ／Ｌ缓冲溶液）范围内,用分光光度法测定了配合物催化对－硝基苯酚乙酸酯（ＮＡ）水解动力学,得到了ＮＡ酯催化水解二级反应速率常数Ｋｃ。结果表明：ＨＬ＾１和ＨＬ＾２的２：１Ｚｎ（Ⅱ）配合物催化ＮＡ酯水解时,五配位配合     

(R)-N-酰基四氢噻唑-2-硫酮-4-羧酸在DCC存在下与胺的反应

由Ｎ－乙酰四氢噻唑－２－硫酮－４－羧酸（［α］２０Ｄ－１０９．８３°），及Ｎ－苯甲酰四氢噻唑－２－硫酮－４－羧酸（［α］２０Ｄ－１１２．２２°），在Ｎ，Ｎ′－二环己基二亚胺（ＤＣＣ）存在下分别与环己胺、苯胺反应得到光学活性产物（Ｒ）－Ｎ－乙酰四氢噻唑－２－硫酮－４－甲酰环己胺（［α］１７Ｄ－７４．５°），及（Ｒ）－Ｎ－苯甲酰四氢噻唑－２－硫酮－４－甲酰苯胺（［α］１９Ｄ－７．０４°）。用量子化学ＰＭ３方法研究了反应物和产物的电子结构。     

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.     

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.     

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%).     

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.