聚(ε-己内酯)/聚(d,l-丙交酯)共混物膜在酶促降解过程中的形态变化

聚（ε┐己内酯）／聚（ｄ，ｌ┐丙交酯）共混物膜在酶促降解过程中的形态变化张杰甘志华＊梁奇志景遐斌（吉林工业大学理学院应用化学系长春）（中国科学院长春应用化学研究所长春１３００２２）关键词聚己酸内酯－聚丙交酯共混物，酶促降解，形态１９９７－１０－３０收...     

聚合物载体-稀土金属配合物的研究ⅩⅦ聚(苯乙烯-4-乙烯基吡啶)钕配合物在丁二烯聚合中的催化行为

聚合物载体－稀土金属配合物的研究．聚（苯乙烯－４－乙烯基吡啶）钕配合物在丁二烯聚合中的催化行为李晓莉于广谦＊李玉良（中国科学院长春应用化学研究所长春１３００２２）关键词苯乙烯，乙烯基吡啶，共聚物，钕配合物，丁二烯聚合１９９６－０４－１１收稿，１９９６...     

丙烯酸丁酯－苯乙烯－丙烯腈共聚物的结构与力学性能

丙烯酸丁酯－苯乙烯－丙烯腈共聚物的结构与力学性能张会轩，韩业，张会良，冯之榴（吉林工学院化工系长春１３００１２）（中国科学院长春应用化学研究所长春）关键词ＡＳＡ，乳液聚合，粒子，力学性能丙烯酸丁酯－苯乙烯－丙烯腈共聚物（ＡＳＡ）是两相结构，聚丙烯酸丁...     

杂多阴离子柱撑水滑石层柱相互作用(Ⅰ)

杂多阴离子柱撑水滑石层柱相互作用（Ⅰ）李兴林＊佘益民郭军蒋大振（中国科学院长春应用化学研究所长春１３００２２）（吉林大学化学系长春）关键词杂多阴离子，柱撑水滑石，ＸＰＳ，ＩＲ，ＸＲＤ１９９６－０６－１８收稿，１９９６－１０－１２修回国家自然科学基金资...     

水溶性壳聚糖的制备与应用

水溶性壳聚糖的制备与应用赵文伟，于黎，钟晓光，张月芳，孙家珍（中国科学院长春应用化学研究所，长春１３００２２）壳聚糖（ｃｈｉｔｏｓａｎ，（１，４）－２－胺基－２－脱氧－β－Ｄ－葡聚糖）是由甲壳素（ｃｈｉｔｉｎ，（１，４）－２－乙酰胺基－２－２脱氧－β...     

4－（2－氨基噻唑）－间苯二酚为柱前衍化剂液相色谱／电化学检测Fe、Co、Ni

４－（２－氨基噻唑）－间苯二酚为柱前衍化剂液相色谱／电化学检测Ｆｅ、Ｃｏ、Ｎｉ格日勒，李惠梅，李南强，汪尔康（中国科学院长春应用化学研究所电分析化学开放实验室，北京大学化学系，长春，１３００２２）关键词液相色谱，Ｆｅ，Ｃｏ，Ｎｉ，４－（２－氨基噻唑）...     

生物降解聚合物膜的制备及防肌腱粘连作用

生物降解聚合物膜的制备及防肌腱粘连作用甘志华景遐斌＊（中国科学院长春应用化学研究所高分子物理联合开放研究实验室长春１３００２２）张仲文徐莘香（白求恩医科大学第一临床医院长春）关键词肌腱粘连，生物降解，聚合物膜１９９６－０７－２１收稿，１９９６－０９－...     

白酒中C_9－C_（18）脂肪酸的气相色谱分析

白酒中Ｃ＿９－Ｃ＿（１８）脂肪酸的气相色谱分析周在德，曾永昌（四川大学化学系成都６１００６４）关键词气相色谱法，白酒，Ｃ＿９－Ｃ＿（１８）脂肪酸。白酒中脂肪酸的含量及相互比例关系，极大地影响着白酒的色，香，味，风格￣（［１］［２］）。一般采用的化学分...     

碳纤维表面的液相氧化处理改性

碳纤维表面的液相氧化处理改性赵东宇＊李滨耀余赋生（中国科学院长春应用化学研究所长春１３００２２）关键词碳纤维，表面改性，氯酸钾，硫酸１９９６－１０－２４收稿，１９９７－０５－２９修回＊现在黑龙江大学化学系（哈尔滨，１５００８０）碳纤维具有高强、高模、...     

异丙基膦酸单（1－己基－4－乙基）辛酯与HPMBP协同萃取稀土元素（Ⅲ）

异丙基膦酸单（１－己基－４－乙基）辛酯与ＨＰＭＢＰ协同萃取稀土元素（Ⅲ）孙静，郑重，李德谦（中国科学院长春应用化学研究所稀土化学与物理开放实验室长春１３００２２）叶伟贞（中国科学院上海有机化学研究所上海）关键词异丙基膦酸单（１－己基－４－乙基）辛酯，...     

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.