共查询到20条相似文献,搜索用时 62 毫秒
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基于具有潜在杀线虫活性的托烷衍生物结构,通过1,3-偶极环加成反应,设计合成了19个未见报道的8-氮杂双环[3.2.1]辛烷-3-异噁唑肟类衍生物,通过~1H NMR,~(13)C NMR和高分辨质谱对目标化合物的结构进行表征.初步的生物活性测试表明:在浓度25 mg/L下,目标化合物对南方根结线虫表现出良好的抑制活性,活性最好的化合物8-甲基-8-氮杂双环[3.2.1]辛烷-3-酮-O-((3-(4-硝基苯基)-4,5-二氢异噁唑-5-基)甲基)肟(9e)在1 mg/L浓度下对根结线虫的抑制率达55.6%. 相似文献
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4-(β-D-吡喃阿洛糖苷)-α-氯代苯甲醛肟与N-芳基马来酰亚胺在三乙胺作用下, 以甲醇为溶剂, 通过1,3-偶极环加成, 合成了一系列未见文献报道的3-(4-β-D-吡喃阿洛糖苷苯基)-4-胺羰基-5-甲氧羰基异噁唑衍生物; 其结构经1H NMR, IR, MS (HRMS)加以确证. 并对4a~4h和5a进行了药理活性筛选, 结果表明, 部分化合物具有良好的镇静活性. 其中, 化合物4b (200 mg8226;kg-1), 4c (200 mg8226;kg-1), 4h (200 mg8226;kg-1), 与豆腐果苷相比较具有更强的活性. 相似文献
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A series of novel Meldrum's acid C60 derivatives were prepared in moderate yields from a convenient one-pot reaction of C60, the Meldrum's acid derivatives, 12 and 1,8-diazabicyclo-[5,4,0]-undec-7-ene (DBU) in toluene at room temperature under nitrogen atmosphere. All the new compounds were fully characterized by the spectral data and elemental analysis. A carbene intermediate mechanism was proposed for this reaction. 相似文献
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Piotr Piotrowski Wojciech Mech Kamila Zarbska Maciej Krajewski Krzysztof P. Korona Maria Kamiska Magdalena Skompska Andrzej Kaim 《Molecules (Basel, Switzerland)》2021,26(6)
In the present work, we report the successful synthesis and characterization of six (two new) fullerene mono- and di-pyrene derivatives based on C60 and C70 fullerenes. The synthesized compounds were characterized by spectral methods (ESI-MS, 1H-NMR, 13C-NMR, UV-Vis, FT-IR, photoluminescence and photocurrent spectroscopy). The energy of HOMO and LUMO levels and the band gaps were determined from cyclic voltammetry and compared with the theoretical values calculated according to the DFT/B3LYP/6-31G(d) and DFT/PBE/6-311G(d,p) approach for fully optimized molecular structures at the DFT/B3LYP/6-31G(d) level. Efficiency of solar cells made of PTB7: C60 and C70 fullerene pyrene derivatives were analyzed based on the determined energy levels of the HOMO and LUMO orbitals of the derivatives as well as the extensive spectral results of fullerene derivatives and their mixtures with PTB7. As a result, we found that the electronic and spectral properties, on which the efficiency of a photovoltaic cell is believed to depend, slightly changes with the number and type of pyrene substituents on the fullerene core. The efficiency of constructed solar cells largely depends on the homogeneity of the photovoltaic layer, which, in turn, is a derivative of the solubility of fullerene derivatives in the solvent used to apply these layers by spincoating. 相似文献
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Oleg G. Sinyashin Irina P. Romanova Gulshat G. Yusupova Valery I. Kovalenko Yuri Y. Efremov Irina I. Vandyukova 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1)
Abstract Data on the structure of cycloadducts of organophosphorus dipolar reagents and fullerenes arc absent, to our knowledge. We died the reactions and the shucturc of cycloadducts of phosphorylated azidcs and nitrile oxide with [60]fullcrcnc. The cycloaddition of diphcnylphosphinic llzide to fullcrme has bcm determined to lead to the 1 -[(N-diphenylphosphoryl)amino]-2-hydroxy[6O]hllcrme (l), the mixhuc of phosphorylated aziridinofullcrcne (2) and derivative of fullerne (3) with one aziridine fragment and one aminohydmxy-fragment, or to product (4), depending on the conditions of don . 相似文献
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QianRongLI LiQunLI ShaYANG 《中国化学快报》2005,16(6):729-732
Photochemical [2 2] cycloaddition of C60 with podophyllotoxin derivative containing a cyclohexadienone group in o-dichlorobenzene afforded an isomeric mixture of adducts and a pure adduct of C60-fused podophyllotoxin derivatives. The structures of the products were characterized by MS, NMR and IR spectra. 相似文献
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