均匀设计法研究溴代硝基甲烷的合成工艺

均匀设计法研究溴代硝基甲烷的合成工艺袁军罗湘华向建敏（武汉化工学院精细化工系４３００７４）关键词均匀设计回归分析溴代硝基甲烷合成中图分类号Ｏ６２３．７１１溴代硝基甲烷是合成广谱抗菌剂２－溴－２－硝基－１，３丙二醇的重要的中间体［１］。在国外有过其合成...     

β－环糊精衍生物的合成及对脲酶的抑制作用

β┐环糊精衍生物的合成及对脲酶的抑制作用＊丁志刚任维衡习玲玲罗天顺宋发军（中南民族学院化学系，武汉４３００７４）关键词β－环糊精，衍生物，脲酶，配合物近年来，随着生物医学工程的迅速发展，新型医用级吸附树脂的研制取得了较大进步．其中有关铵离子和尿素的吸...     

α—[2—（2,4—二氯苯氧基）丙酰氧基]烃基膦酸酯的合成与生物活性

α┐［２┐（２．４┐二氯苯氧基）丙酰氧基］烃基膦酸酯的合成与生物活性贺红武刘钊杰＊汪军（华中师范大学有机合成化学研究所武汉４３００７９）（孝感师范高等专科学校化学系孝感）关键词羟基膦酸酯，合成，生物活性，除草剂１９９７－１０－２１收稿，１９９８－０４...     

含生色基团烯类单体及其聚合物——N－丙烯酰基吩■嗪及其聚合物的合成和其荧光性质

含生色基团烯类单体及其聚合物——Ｎ－丙烯酰基吩嗪及其聚合物的合成和其荧光性质＊于淑艳姚光庆李福绵（北京大学化学系北京１００８７１）关键词Ｎ－丙烯酰基吩嗪,紫外－可见光谱,荧光光谱,“结构自猝灭”效应,Ｓｔｅｒｎ－Ｖｏｌｍｅｒ常数,荧光寿命我们曾报...     

四羰基钴钠合成及红外光谱研究

四羰基钴钠合成及红外光谱研究李光兴，朱治良，蔡晓江，梅付名（华中理工大学化学系，武汉４３００７４）郭小川（湖北省襄樊市化工研究所，襄樊４４１０２２）关键词Ｎａ［Ｃｏ（ＣＯ）_４］，Ｎａ_２Ｓ_２Ｏ_３，羰基化，红外光谱．１．前言羰基钴是一种十分重要的均相...     

6-羟基富烯及环戊二烯并[d][1,2]嗪的合成

由６，６－二烷基富烯与烯丙基格氏试剂加成所得到的取代环戊二烯基负离子与芳酰氯反应，合成了５个未见文献报道的６－羟基富烯化合物（１～５）。用此类化合物与羟胺反应，合成了５个新的环戊二烯并［ｄ］口恶嗪化合物（６～１０），其结构经ＩＲ，１ＨＮＭＲ和元素分析证实。     

青山烟煤中痕量元素的分布特性

青山烟煤中痕量元素的分布特性晏蓉，欧阳中华，曾汉才，吴育松，王秋华，陆晓华，徐涛（华中理工大学煤燃烧国家重点实验室，武汉４３００７４）（华中理工大学化学系，武汉４３００７４）关键词烟煤，痕量元素，分布特征煤中矿物质的存在对煤的使用有很大影响，最大影响...     

含取代嘧啶环的α-氯乙酰脲的合成及生物活性研究

含取代嘧啶环的α－氯乙酰脲的合成及生物活性研究＊薛思佳陈代进＊＊谭冬云张爱东（华中师范大学化学系武汉４３００７９）关键词嘧啶α－氯乙酰脲合成植物生长调节剂中图分类号Ｏ６２６．４１酰基脲类化合物具有杀虫，除草，调节植物生长等生物活性。为了寻找具有高活性...     

如何写好毕业论文

如何写好毕业论文伍明伍茵（中南民族学院化学系武汉４３００７４）（湖北函授大学武汉４３００７４）毕业论文一般是学生的首次科技论文写作。各专业虽然对此都有严格的要求，但目前却大都没有课程指导。毕业设计期间教师的指导也往往偏重于论文内容本身，如正确新颖的方...     

可修饰的内酯，α-氯甲基-α-甲基-β-丙内酯的合成和聚合

可修饰的内酯，α－氯甲基－α－甲基－β－丙内酯的合成和聚合＊王明霞李子臣贺晓晖杨丽＊＊李福绵（北京大学化学系北京１００８７１）关键词α－氯甲基－α－甲基－β－丙内酯，开环聚合＊１９９５－０２－２０收稿；１９９６－０３－１２修回：自然科学基金课题；＊＊...     

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.