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众所周知,氨基冠醚是合成许多功能基冠醚的关键中间体。继前文[’,‘l之后,本文报道另一种新的N-(4一氨基苯基)氮杂12一冠一4(1)的合成。由对硝基苯胺出发的合成路线如下:由于氨基冠醚是粘稠液不易分离纯化,且易在空气中被氧化而变黑。所以,一当其前体化合物N-(4一乙酸胺基苯基)氮杂12一冠一一4(2)被碱水解后,即可将氨基冠醚转化成其氢澳酸盐而析出,从而使其能较长时间保存。2作为关键中间体,其环化反应时间虽然最长达96h,但产率在各步反应中却是最低的(40.5%)。这可能是个氨基乙酸苯胺(3)… 相似文献
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由(+)-2-氨基丁醇合成氮杂手性冠醚 总被引:2,自引:0,他引:2
手性冠醚由于具有手性识别和不对称催化有机反应的性质而受到人们的重视,有关它们的合成及性质,已很多论述。氮杂冠醚则是合成穴醚、双冠醚、套索冠醚(LariatEther)等的重要中间体,也可与高分子材料(高分子载体或高分子基质)连接,用于有机化合物的色谱分离。氮杂手性冠醚兼备手性和氮杂冠醚两种特性,而可能具有广泛的用途。 相似文献
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C60和β-叠氮丙酸在氰苯中回流,产物经柱色谱分离、FD-MS证实为五加成C60衍生物,^13C NMR、FT-IR和UV光谱对产物结构进行了表征。 相似文献
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Fifteen novel (3-chloro-5-(trifluoromethyl)pyridin-2-yloxy)phenyl containing Baylis-Hillman adduct derivatives were designed and synthesized. Evaluation of their biological activities showed that methyl 2-((3-(3-chloro-5-(trifluoromethyl)pyridin-2-yloxy)phenoxy)(phenyl)methyl)acrylate (2g) exhibited efficient broad-spectrum fungicidal activity, with 100% control of wheat powdery mildew and cucumber downy mildew and 98% control of cucumber anthracnose at 400 g ai/ha. Some of the other title compounds 2, 3 and two Baylis-Hillman bromide intermediates (11a, 11b) had moderate to good fungicidal activity. 相似文献
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4—取代苯基—6—甲基—5—硫代—1,2,4—三嗪—3—酮的合成 总被引:3,自引:0,他引:3
合成了一系列新的4,6-二取代-5-硫代-1,2,4-三嗪-3-酮类化合物,并用元素分析、IR、^1H NMR及MS对其结构进行了表征。 相似文献
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The title compound (ethyl5-(4-(2-phenylacetamido)phenyl)-1H-pyrazole-3-carboxy- late, C20H19N3O3) was synthesized by the reaction of Claisen condensation, cyclization, reduction and acylation. The structure was characterized by X-ray diffraction, MS, NMR and IR. It belongs to the monoclinic system, space group C2/c with a = 22.723(9), b = 9.324(4), c = 18.890(8) , β = 114.259(6)°, V = 3649(3) 3, Dc = 1.272 Mg·m-3, Z = 8, Mr = 349.38, μ = 0.087 mm-1, F(000) = 1472, the final R = 0.0615 and wR = 0.1643. The biological test shows that the title compound has a moderate acrosin inhibition activity. 相似文献
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The Synthesis of 3-(2'-Hydroxybutyl) isobenzofuran-1 (3H)-one 总被引:1,自引:0,他引:1
l(3H】.Isobenzoturans(Dhthalldes】werereDortedtoexhibitawiderangeofbiologicalactivities.Forexample,3-n-butylphthallde(NB)exhibitsantlasthmatlc’,antlconvuls-ant“actlvltles.PenEandZhouhavestudiedonthemetabolismofNBPInrats‘.Theyfoundthat... 相似文献
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4-羟基-2,5-二甲基-3(2H)呋喃酮的合成 总被引:3,自引:0,他引:3
总结了食品增香剂4-羟基-2.5-二甲基-3(2H)呋喃国的合成方法,包括近期的合成研究进展,对一些合成方法的优缺点作了评述。参考文献28篇。 相似文献
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二[N,N-(1,5-亚戊基)氨荒酸]二氯化锡和二(对氟苄基)氯化锡N,N-(1,5-亚戊基)氨荒酸酯的合成、表征及晶体结构 总被引:1,自引:0,他引:1
合成了二[N,N-(1,5-亚戊基)氨荒酸]二氯化锡和二(对氟苄基)氯化锡N,N-(1,5-亚戊基)氨荒酸酯.用X射线单晶衍射测定了这两个化合物的晶体结构.化合物1为单斜晶系,空间群P21, a=0.8635(5) nm, b=0.8842(5) nm, c=1.2942(7) nm, β=102.177(9)°, Z=2, V=0.9659(9) nm3, Dc=1.719 g/cm3, μ=2.024 mm-1, R=0.0428, wR=0.0918.化合物2正交晶系,空间群Pbca, a=1.3616(13) nm, b=1.1679(11) nm, c=2.7603(3)nm, Z=8, V=4.389(7) nm3, Dc=1.612 g/cm3, μ=1.498 mm-1, R=0.0355, wR=0.0887.在化合物1中,锡原子呈六配位畸变八面体构型,化合物2的锡原子呈五配位畸变三角双锥构型. 相似文献
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The reaction of diaminotetrachloro-cyclotriphosphazene with tetrachloride of μ-imino-diphosphoric acid leads to the formation of the salt-like compound [P3N3HCl4(NH2)2]+[N(POCl2)2]− which identity was unambiguously established by means of X-ray structure analysis. The structure is composed of [P3N3HCl4(NH2)2]+ cations and [N(POCl2)2]− anions joined by a system of H-bonds. As in other phosphazenium salts, the protonation of the ring N atom leads to significant changes in the endocyclic P N bond lengths. 相似文献
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通过1[(Z)2(三苯基锡基)乙烯基]环戊醇与Br2反应制得了新化合物1[(Z)2(苯基二溴化锡基)乙烯基]环戊醇.通过元素分析、锡含量测定、IR、1HNMR对其进行了表征并用X射线衍射法测得了所合成化合物的晶体结构.该化合物属正交晶系,P212121空间群,晶胞参数:a=08675(4)nm,b=12523(7)nm,c=14009(8)nm;Z=4,V=15219nm3,Dc=2.39cm3,u=23.72cm-1.结构分析表明,标题化合物分子为畸变的三角双锥构架,双键的两个氢取顺式结构,分子中O与Sn配位,形成五元螯合环结构 相似文献
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A series of new polyamides containing both sulfone and oxyethylene moieties in the polymer chain was prepared by the direct polycondensation of the diamine monomer 2,2‐bis[4‐[2‐(4‐aminophenoxy)ethoxy]phenyl]sulfone (BAEPS) and various aromatic dicarboxylic acids in N‐methyl‐2‐pyrrolidinone (NMP) using triphenyl phosphite and pyridine as condensing agents. Polymers were produced with inherent viscosities of 0.30–0.60 dl/g and identified by elemental analysis, and infrared and nuclear magnetic resonance spectra. Most of the polymers were readily dissolved in polar solvents such as NMP, dimethylsulfoxide, N,N‐dimethylacetamide, N,N‐dimethylformamide and m‐cresol at room temperature. Polymers containing rigid and symmetric p‐phenylene, naphthalene and p‐biphenylene moieties revealed a crystalline nature and showed no solubility in organic solvents. These polyamides had 10% weight loss temperatures ranging between 423 and 465 °C in nitrogen atmosphere and glass transition temperatures between 170 and 305 °C. The polymers with crystallinity nature exhibited melting endotherms (Tm) below 386 °C in differential scanning calorimetry trace. Copyright © 1999 John Wiley & Sons, Ltd. 相似文献