共查询到20条相似文献,搜索用时 15 毫秒
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Cabaleiro Santiago Pérez-Lourido Paulo Castro Jesús Romero Jaime García-Vázquez J. Arturo Sousa Antonio 《Transition Metal Chemistry》2001,26(6):709-716
Neutral copper complexes of the deprotonated [(4-methylphenyl)sulfonyl]-1H-imino-(2-phenyl-2-oxazoline) proligands, [HTs-ROz], R = H, 5-Me, 4-Me, 4-Et, 4-iPr, have been prepared by electrochemical oxidation of anodic copper in an MeCN solution of the corresponding proligand. The [Cu(Ts-ROz)2] complexes were characterised by microanalysis, i.r. and electronic spectroscopies, and by e.p.r. and magnetic measurements. The crystal structures of HTs-5MeOz, [Cu(Ts-Oz)2], [Cu(Ts-5MeOz)2] and [Cu(Ts-4MeOz)2] were determined by X-ray diffraction. 相似文献
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报道一个新型胰岛素增敏剂4-(4-{5-[(二苄胺基甲酰)-甲基]-2-庚基-4-羰基-噻唑-3}-丁基)苯甲酸的合成方法. 该化合物以对碘苯甲酸为原料, 经过羧基的保护、Heck反应、还原反应、Ing-Mnske反应、噻唑环合成、酰胺制备和羧酸保护基解除等一系列反应, 通过对反应条件的优化, 高产率合成4-(4-{5-[(二苄胺基甲酰)-甲基]-2-庚基-4-羰基-噻唑-3}-丁基)苯甲酸, 并对其中间体对碘苯甲酸叔丁酯的合成方法进行研究. 相似文献
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L. S. Kosolapova A. R. Kurbangalieva M. F. Valiev O. A. Lodochnikova E. A. Berdnikov G. A. Chmutova 《Russian Chemical Bulletin》2013,62(2):456-463
Reactions of 3-chloro-5-methoxy-4-[(4-methylphenyl)sulfanyl]-2(5H)-furanone with different nitrogen-containing binucleophilic agents were studied. The reaction with hydrazine monohydrate resulted in the formation of 1,5-dihydro-2H-pyrrol-2-one and pyridazin-3(2H)-one derivatives, whereas the reaction with phenylhydrazine led exclusively to 1-phenylamino-1,5-dihydro-2H-pyrrol-2-one. The reaction with ethylenediamine resulted in the isolation of 1,2-bis[2-oxo-1,5-dihydro-2H-pyrrol-1-yl]ethane: the enantiomeric dl-pair and two poly-morphic modifications of meso-form, which were characterized by X-ray crystallography. 相似文献
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Kosar B Albayrak C 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2011,78(1):160-167
In this work the electronic structure of (E)-4-methoxy-2-[(p-tolylimino)methyl]phenol has been characterized by the B3LYP/6-31G(d) level by using density functional theory. The experimental infrared and electronic absorption spectra have been obtained and compared with the theoretically obtained ones. Molecular electrostatic potential map has been evaluated; natural bond orbital and frontier molecular orbitals analysis have been performed from the optimized geometry. The energetic behavior of the title compound has been examined in solvent media using polarizable continuum model. The non-linear optical properties have been computed with the same level of theory. In addition, the changes of thermodynamic properties have been obtained in the range of 100-500 K. 相似文献
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Aart Molenberg Daniela Michalke Martin Mller Thomas Pieper 《Journal of polymer science. Part A, Polymer chemistry》1998,36(1):169-177
Poly[(S)-(+)-2-methylbutyl]pentylsiloxane has been synthesized by anionic ring opening polymerization of the corresponding strained cyclic trisiloxane with cryptated lithium (Li+/[211]) as counterion. The polymer did not show the low and high temperature crystalline phases, that are generally found for poly(di-n-alkylsiloxane)s. Instead, the material formed a hexagonal columnar mesophase until it melted around 400°C. MAS and solution 13C- and 29Si-NMR, polarizing microscopy and WAXS indicated an unexpectedly regular chain structure. It was tentatively concluded that the steric interaction of the (S)-(+)-2-methylbutyl side chains introduces sufficient regularity of the tacticity and that the chains tend to adopt a defect helix conformation. On the other hand, DSC showed the presence of a glass transition at −113°C, indicating a high flexibility of the backbone. © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 169–177, 1998 相似文献
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Experimental vibrational circular dichroism (VCD) spectra for the dextrorotatory enantiomer and theoretical VCD spectra obtained with localized molecular orbital theory using 6-31G* basis set for the (R) configuration of 2-methylthiirane-3,3-d(2) in the 700-1500 cm(-1) region are presented. The observed and predicted VCD signs are in very good agreement suggesting that the dextrorotatory enantiomer has the (R) configuration. This conclusion is also supported by the optical rotational data. 相似文献
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A. A. Avetisyan I. L. Aleksanyan L. P. Ambartsumyan 《Russian Journal of Organic Chemistry》2008,44(5):723-727
By a reaction of 2-methyl-4-chloroquinolines with o-mercaptoaniline under various conditions synteses were performed of substituted in the benzene ring 4-[(2-aminophenyl)thio]-2-methylquinolines and (4E)-4-[(2-mercaptophenyl)imino]-2-methyl-1,4-dihydroquinolines that were respectively by isomerization or rearrangement converted into 4-[(2-mercaptophenyl)amino]-2-methylquinolines. 相似文献
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M. A. Rekhter B. A. Rekhter I. G. Yazlovetskii A. A. Panasenko F. Z. Makaev 《Chemistry of Heterocyclic Compounds》1998,34(3):275-277
Only the bromine atom at the primary carbon atom participates in nucleophilic replacement by a trifluoroacetate ion and elimination of HBr in 1-(2,3-dibromopropyl)isatin.Institute for the Biological Protection of Vegetation, Academy of Sciences of the Republic of Moldova, 2060 Kishinev, Moldova. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 308–310, March, 1998. 相似文献
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研究了以2-羟基-4-甲氧基苯甲醛和2-氨基-6-甲基吡啶为原料合成新型席夫碱化合物5-甲氧基-2-[(E)-(6-甲基吡啶-2-亚氨基)甲基]苯酚的方法。当2-羟基-4-甲氧基苯甲醛与2-氨基-6-甲基吡啶摩尔比为1∶1.6,反应时间为6 h,反应温度为75℃时,反应产率最高。采用元素分析、UV-Vis、IR、1H NMR、X-射线单晶衍射等方法进行结构表征。该化合物为单斜晶系,空间群P21/c,a=1.1886(3)nm,b=0.65948(16)nm,c=1.6897(4)nm,β=108.505(3)°,V=1.2560(5)nm3,Dc=1.281 g·cm-3,Z=4,F(000)=512,μ=0.087 mm-1,R1=0.0477,wR2=0.1342。通过π···π堆积和分子内氢键O2-H2···N1、C8-H8A···N2形成较稳定的晶体结构,并具有蓝色荧光。 相似文献
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Two efficient syntheses of 3-chloro-7-[(chlorocarbonyl)methoxy]-4-methylcoumarin are described, one utilizing traditional chemistry starting from 3-chloro-7-hydroxy-4-methylcoumarin, while the other uses a novel reagent, sulfuryl chloride/thionyl chloride, in a one-pot reaction starting from 7-(carboxymethoxy)-4-methylcoumarin. 相似文献
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The title compounds were synthesized and characterized by IR,1H-NMR,Mass and elementary analysis and single-crystal X-ray diffraction.In 1a,intermolecular C-H…π interactions produce a three-dimensional network.In 1b,intermolecular C-H…O hydrogen bonds generate an R22(22) ring.The hydrogen bonding is supported by C-H…π interactions. 相似文献