2-硫代-4-噻唑啉酮衍生物的合成

2-硫代-4-噻唑啉酮(1)与醛反应, 再用甲醛和胺进行胺甲基化, 合成5-芳基亚甲基-3-确定胺甲基-2-硫代-4-噻唑啉酮.     

（R）—N—（γ—烃基—δ—酮己酰基）四氢噻唑—2—硫酮—4—羧酸乙酯的合成及…

γ－甲基－δ酮己酸，γ－异丙基－δ－酮己酸在碘化Ｎ－甲基－２－氯吡啶盐存在下分别用（Ｒ）－四氢噻唑－２－硫酮－４－羧酸乙酯反应，得到光学活性的（Ｒ）－Ｎ－（γ－甲基－δ－酮己酰基）四氢噻唑－２硫酮－４羧酸乙酯（ｌａ）及光学活性的（Ｒ）－Ｎ－（γ－异丙基－δ－酮己酰基）四氢噻唑－２－硫酮－４－羧酸乙酯（１ｂ），ｌａ，ｌｂ分别同（Ｒ，Ｓ）－α－苯乙胺反应得到光学活性的酰胺２ａ，２ｂ，同时使（Ｒ，Ｓ）＝     

（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。     

2—芳甲酰氨基硫羰基—3—异噻唑酮及4—氰基—5—甲硫基—2—芳甲…

通过３－羟基异噻唑和４－氰基－５－甲硫基－３－羟基异噻唑（５）分别与芳酰基异硫氰酰酯（３）反应,合成标题化合物２－芳甲酰氨基硫羟基－３－异噻唑酮和４－氰基－５－甲硫基－２－芳甲酰氨基硫羟基－３－异噻唑酮,对此反应及产物的结构特点进行了探讨。     

含吲哚啉酮取代基的噻唑酮类化合物的合成及其抗菌活性研究

目的：合成一系列含吲哚啉酮骨架的噻唑酮类化合物并对其进行抗耐药白念珠菌活性筛选。方法：以不同取代基的4-苯基噻唑-2(3H)-酮和不同取代的2-苯基-3H-吲哚-3-酮为起始原料,进行Friedel-Crafts烷基化反应,优化并合成一系列目标衍生物,并采用微量稀释法对合成的化合物进行了抗真菌活性研究。结果与讨论：报道了一种新型合成含吲哚啉酮取代基的噻唑酮类化合物的方法,优化反应条件后以良好至优秀的产率得到了22个化合物。微量稀释法测试结果显示,合成的化合物其效果除了化合物17,18效果较差以外,其余20个化合物效果优秀,值得进一步探讨和研究。     

2-取代-3-芳基-4-噻唑啉(硫)酮衍生物的合成、晶体结构和生物活性

从2-取代-3-芳基-4-噻唑啉酮(4a～4e和5)合成了三个系列新型噻唑啉酮衍生物, 即5-芳基亚甲基-4-噻唑啉酮(6a～6j), 4-噻唑硫酮(7a～7e和8)和4-氰基亚胺基噻唑烷(11a～11e和12). 中间体4a～4e和5由醛、胺和巯基乙酸缩合得到. 所有化合物的结构均经元素分析和¹H NMR确证, 并且采用X射线单晶衍射分析方法测定了化合物4b的结构. 初步生物活性试验结果表明, 部分标题化合物具有一定的杀菌活性和促进黄瓜子叶生根活性.     

水溶液中芳香醛与噻唑酮衍生物的缩合反应

水相;芳香醛;噻唑二酮;n-苯基绕丹宁;四丁基溴化铵     

噻唑环稠合的环丁烯砜的制备和反应:合成邻二亚甲基噻唑的有用前体

从4-溴-3-环丁砜酮制备了噻唑稠合的3-环丁烯砜,这些3-环丁烯砜作为0-二甲叉噻唑的合成等价物进行反应.     

3—芳基—5—苯甲酰基—2—硫代—4—噻唑啉酮的合成

报道了３－芳基－２－硫代－４－噻唑啉酮和３－芳基－５－苯甲酰基－２－硫代－４－噻唑啉酮系列化合物的合成，其中１１种化合物示见文献报道。结构经元素分析，红外光谱，核磁共振氢谱和质谱确证，讨论了合成反尖条件下和质谱裂解途径，初步生理活性试验结果表明，２ｄ和２ｅ具有一定的生理活性。     

α—溴代丙酰氯与四氢噻唑—2—硫酮衍生物的反应及量化学研究

α－溴代丙酰氯分别同四氢噻唑－２－硫酮及－四氢噻唑－２－硫酮－４－羧酸乙酯反应得四氢噻唑－２－－α－溴代丙酰硫酯２ａ及光学活性－４－乙氧羰基四氢噻唑－２－α溴代丙酰硫酯２ｂ。     

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.     

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.     

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.     

Selective syntheses of 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones via temperature-dependent Rh(II)-carbenoid-mediated 2H-azirine-ring expansion

The Rh(II)-catalyzed reaction of 2-carbonyl-substituted 2H-azirines with ethyl 2-cyano-2-diazoacetate or 2-diazo-3,3,3-trifluoropropionate provides an easy access to 2H-1,3-oxazines and 1H-pyrrol-3(2H)-ones. These compounds can be selectively prepared from the same starting material using temperature as the only varied parameter. The 2-azabuta-1,3-diene intermediate, a common precursor for both heterocyclic products, isomerizes into 2H-1,3-oxazine under kinetic control, while 1H-pyrrol-3(2H)-one is the sole product of the reaction at elevated temperatures. According to DFT-calculations a one-atom oxazine ring contraction involving ring-opening to a 2-azabuta-1,3-diene intermediate, followed by a 1,5- and 1,2-prototropic shift leads to the consecutive formation of imidoylketene and azomethine ylide, which then further undergo cyclization to the pyrrole derivative.     

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.