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3-二茂铁基-2-丁烯酸乙酯与8种不同类型的酰氯反应,合成了8种具有两亲结构的α,β-不饱和酯二茂铁双取代新衍生物。同时,发现一种新的酰化反应现象,即3-二茂铁基-2-丁烯酸乙酯与2-丁烯酰氯或肉桂酰氯反应时,酰化反应既能在茂环上又能在α,β-不饱和酯基的烯键上发生,得到另两种新化合物。测得了上述10种化合物的1HNMR谱、IR光谱及元素分析数据。 相似文献
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通过ω-溴代丁基季盐与一系列取代芳醛的固/液相转移Wittig反应合成了1-芳基-5-溴代戊烯-1,然后利用其与α-三唑基酮的固/液相转移催化C-烷基化反应,合成了9个标题化合物。对其中部分化合物进行了初步的杀菌活性测定,结果表明:标题化合物具有一定的抑菌活性。 相似文献
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采用一种有效的方法合成了具有不同链长的二脂酰基α-D-半乳糖型甘油糖脂 。将半乳糖烯丙苷化,重结晶得到α-D-半乳糖烯丙苷。随后将糖环的羟基用苄 基保护,再利用OsO4/NMO(N-甲基-N-氧吗啉)的二羟基化条件将1-O烯丙基氧化 成为邻二羟基,得到3-O-(2′,3′,4′,6′-四-O-苄基-α-D-吡喃半 乳糖基)-sn-甘油。其与不同链长的脂酰氯进行脂酰化反应,然后氢解去掉苄基 得到五种二脂酰基α-D-半乳糖苷基甘油。利用^1H NMR,^13C NMR,2D NMR,IR和MS 对化合物的结构进行了确证。 相似文献
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以二苯腈二氯化钯为催化剂,在固液相转移条件下,芳基磺酰氯能与N,N-双烷基取代丙烯酰胺发生偶联反应,生成柏应的E式不饱和酰胺。 相似文献
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This paper is a continuation of the study and applications of biacetyl bis(4-phenyl-3-thiosemicarbazone) (BBPT) and bipyridylglyoxal bis(4-phenyl-3-thiosemicarbazone) (BGPT). A number of spectrophotometric determinations have been carried out. BBPT is suggested as a reagent for the extractive spectrophotometric determination of cadmium and bismuth. The formation of heteropolinuclear cobalt-BGPT-nickel and copper-BGPT-nickel complexes at acid pH have been reported. 相似文献
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S.K. Vasisht Tripat P. Kaur Jyotsna Kaushal Seema Dixit 《Journal of organometallic chemistry》1997,540(1-2):51-54
Sodium bis(trimethylstannyl)amide NaN(SnMe3)2, isolated by the reaction of trimethylstannyldiethylamine with sodium amide, reacts with tris(trimethylsilyl)hydrazino—dichloro-phosphine to form bis(trimethylsilyl)bis(trimethylstannyl)-2-phospha-2-tetrazene, (Me3Si)2N-N=P-N(SnMe3)2. Both the molecules have been isolated and characterized. 相似文献
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Shin-ichi NayaMakoto Nitta 《Tetrahedron》2003,59(23):4157-4165
The synthesis and properties of a novel type of bis(heteroazulen-3-yl)methyl cations, bis(2-oxo-2H-cyclohepta[b]furan-3-yl)methyl cation salt and nitrogen analogues, (9a-c·PF6−) and (9a-c·BF4−), as well as bis(heteroazulen-3-yl)ketones (12a-d) are studied. The synthetic method was based on a TFA-catalyzed electrophilic aromatic substitution on the heteroazulenes (6a-d) with paraformaldehyde to afford the corresponding disubstituted methane derivatives 7a-d, followed by oxidative hydrogen abstraction with DDQ, and subsequent exchange of the counter-anion by using aq. HPF6 or aq. HBF4. In addition, the reaction of 7a-d with 2.2 equiv. amounts of DDQ afforded carbonyl compounds 12a-d. The delocalization of the positive charge of 9a-c was evaluated by the 1H and 13C NMR spectral data. The thermodynamic stability of cations 9a-c was evaluated to be in the order 9a<9b<9c on the basis of their reduction potentials measured by cyclic voltammetry (CV) and pKR+ values (2.6-10.3) obtained spectrophotometrically. The reduction waves of cations 9a-c were irreversible, suggesting the dimerization of the radical species generated by one-electron reduction. This was demonstrated by the reduction of 9a·BF4− with Zn powder to give dimerized product 14a. In addition, the quenching of 9a·BF4− with MeOH/NaHCO3 gives ether derivative 15a, which is proposed for the precursor for synthesizing tris(heteroazulene)-substituted methyl cations bearing two different heteroazulene-units. 相似文献
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N. N. Aleinikov S. A. Kashtanov I. A. Pomytkin A. M. Sipyagin 《Russian Chemical Bulletin》1995,44(1):180-181
Bis(tetramethylammonium), bis(tetrabutylammonium), and bis(tetraphenylarsonium) dihydrohexaoxoxenonates(VIII) were obtained in an aqueous solution and in acetonitriie. The rate constants of their decomposition were determined.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 184–185, January, 1995.This work was carried out with financial support from the International Scientific Foundation (Grant REI 000). 相似文献
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Ahmed E. M. Mekky 《合成通讯》2019,49(11):1385-1395
Novel bis(2-oxo-2H-chromene) as well as bis(2-imino-2H-chromene) derivatives incorporating piperazine moiety were prepared by the cyclocondensation reaction of bis(2-hydroxybenzaldehyde) with two equivalents of each of the appropriate β-ketoesters or acetonitrile derivatives. The bis(2-imino-2H-chromene-3-carbothioamide) derivative was used as a key synthon for construction of novel bis(3-(4-substituted thiazol-2-yl)-2H-chromen-2-one) derivatives via its cyclocondensation with a series of the appropriate α-halocarbonyl derivatives. Moreover, the bis(2-hydroxybenzaldehyde) reacted with four equivalents of the appropriate acetonitrile derivatives to afford the corresponding bis(3H-chromeno[3,4-c]pyridine) derivatives. Elucidation of the structure of the novel bis(chromenes) bearing piperazine nucleus was established by the spectral data and elemental analyses. 相似文献
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O. N. Babkina T. A. Bazhenova N. M. Bravaya V. V. Strelets M. Yu. Antipin A. Lysenko 《Russian Chemical Bulletin》1996,45(6):1458-1465
Redox reactions of the sandwich jn5-(Ph)Ind]2Ni complex (1) (where (Ph)Ind is the 2-plrenylindenyl anion) in CH2CI2 and of the bent-sandwich (5-(Plr)Ind]2ZrCl2 complex (2) in THF have been studied by low-temperature cyclic voltammetry. Complex ( undergoes quasi-reversible two-step oxidation to cation i+ and dication 12+, which are stable at room temperature within the cyclic voltammetry time scale. Two-electron reduction of complex 1 is irreversible up to -50 °C, and this process is accompanied by destruction of the sandwich structure of the complex. Redaction of complex 2 is described by the conventional scheme for bent-sandwich complexes. According to this scheme, further one-electron reduction of radical anion 2- generates dianion 22–, which eliminates two CI– ions to afford bisindcnyl sandwich complex (5-(Ph)lnd]2Zr (3). This complex is stable at T < -45 °C within the cyclic voltammetry time scale and is capable of undergoing one-electron reduction to the corresponding radical anion 3-. Synthesis and crystal structures of complexes 1 and 2 are reported.Translated fromIzvestiya Akademii Nauk. Seriya Kidmicheskaya, No. 6, pp. 1529–1536, June, 1996. 相似文献
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Zimniak A 《Journal of mass spectrometry : JMS》2002,37(11):1145-1151
Two binuclear bis(tricarbonyliron) title complexes with N(2)Fe(2) tetrahedral cores, 1 and 2, respectively, which show different molecular folding resulting from the appearance (in 1), and absence (in 2) of the N-N sigma-bond, were compared in terms of mass spectral fragmentation routes. A multipath fragmentation noted for the molecule 1 revealing internal stress contrasts with the single-route fragmentation of 2. The fragmentation paths resulting from the admixtures were defined and analyzed from the fragment ion B/E and parent ion B(2)/E linked scan spectra. 相似文献
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Cheng‐Lin Chung Chin‐Ping Yang Sheng‐Huei Hsiao 《Journal of polymer science. Part A, Polymer chemistry》2006,44(9):3092-3102
A series of novel aromatic poly(ether imide)s (PEI) containing ortho‐catenated phenylene rings and pendant trifluoromethyl group have been prepared from 1,2‐bis(3,4‐dicarboxyphenoxy)benzene dianhydride (1) with seven trifluoromethyl‐substituted aromatic bis(ether amine)s ( 2a‐g ) via a conventional two‐stage process that included ring‐opening polyaddition to form the poly(amic acid)s followed by chemical imidization to the polyimides. These PEIs had inherent viscosities in the range of 0.45–1.17 dL/g that corresponded to weight–average and number–average molecular weights (by gel‐permeation chromatography) of 42,000–102,000 and 28,500–67,500, respectively. All the PEIs were readily soluble in many organic solvents and could be solution‐cast into transparent, flexible, and strong films. These films were essentially colorless; they had a very low yellowness index of 4.34–6.55 and an UV–vis absorption cut‐off wavelength at 361–370 nm. The PEIs exhibited moderate‐to‐high glass‐transition temperatures (Tg) in the range of 185–270 °C, softening temperatures (Ts) in the range of 184–275 °C, and 10% weight loss temperatures higher than 466 °C in nitrogen or in air. They also showed low moisture absorptions of 0.49–0.70% and low dielectric constants of 2.78–3.26 (measured at 10 kHz). © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 44: 3092–3102, 2006 相似文献
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The synthesis and analytical properties of bipyridylglyoxal bis(4-phenyl-3-thiosemicarbazone) are described. The solubility, spectral characteristics and pK values are reported, as well as the absorptivity and stoichiometric ratio of metal chelates formed. 相似文献
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标题化合物(C24H22Fe2HgO2)3是由2 氯汞基 1 乙酰基二茂铁与乙二胺反应得到的,其结构通过单晶X 射线衍射法确定。其晶体属三斜晶系,P 1空间群,Mr=1964 12,a=10 193(2),b=11 504(2),c=14 413(3) ,α=92 21(3),β=104 12(3),γ=102 67(3)°,V=1591 55(5) 3,Z=1,Dc=2 049mg/cm3,μ=8 583mm-1,F(000)=942,最终偏离因子为R=0 0859,wR=0 2617。该晶体中同时含有meso型及dl型分子,各分子中Hg原子的配位情况不一样。meso分子中的两个二茂铁是相互平行的,而另两分子dl型的二茂铁是相互垂直的。Hg原子以桥联形式连接两个二茂铁部分。meso型与dl型分子通过Hg O弱配位作用相连。 相似文献