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Condensation reaction of β-triphenylgermanyl propionic acid with α-hydroxy phosphonic ester and the structure of the products

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Science China Chemistry 1995年第8期38卷 897-902页

作者：陈茹玉毛丽娟张鸣 Research Institute of Elemento-Organic Chemistry Nankai UniversityTianjin 300071China

The sterically hindered condensation of β-triphenylgermanyl propionic acid withα-hydroxy phosphonic ester has been *** failure of conventional ways of the condensation is probablydue to the bulky groups Ph3Ge-and-P（O）（OR）2.However,several novel O,O-dialkyl-α-（β-triphenylgermanyl）propionoxy phosphonic esters have been synthesized successfully in good yields by using DCC catalyzed bypyridine or *** reactivity has much to do with the steric hindrance of the groups *** the OR,the slower the reaction rate *** the new products were characterized by 1H NMR,IRspectra,MS and elemental analyses.A single crystal A1 was obtained and the structure was determined byX-ray *** bioassays showed that the new products exhibit antitumor activity.

关键词： condensation reaction β-triphenylgermanyl propionic acid α-hydroxy phosphonic ester single crystal

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Synthesis of Bifunctional Poly(Vinyl phosphonic Acid-<i>co</i>-glycidyl Metacrylate-<i>co</i>-divinyl Benzene) Cation-Exchange Resin and Its Indium Adsorption

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Open Journal of Polymer Chemistry 2013年第4期3卷 104-112页

作者： Chi Won Hwang Chang Soo Lee Taek Sung Hwang Department of Applied Chemistry and Biological Engineering Chungnam National University Daejeon Korea

Poly(vinyl phosphonic acid-co-glycidyl methacrylate-co-divinyl benzene) (PVGD) and PVGD containing an iminodi-acetic acid group (IPVGD), which has indium ion selectivity, were synthesized by suspension polymerization, and their indium adsorption properties were investigated. The synthesized PVGD and IPVGD resins were characterized using Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and mercury porosimetry. The cation-exchange capacity, the water uptake and the indium adsorption properties were investigated. The cation-exchange capacities of PVGD and IPVGD were 1.2 - 4.5 meq/g and 2.5 - 6.4 meq/g, respectively. The water uptakes were decreased with increasing contents of divinyl benzene (DVB). The water uptake values were 25% - 40% and 20% - 35%, respectively. The optimum adsorption of indium from a pure indium solution and an artificial indium tin oxide (ITO) solution by the PVGD and IPVGD ion-exchange resins were 2.3 and 3.5 meq/g, respectively. The indium adsorption capacities of IPVGD were higher than those of PVGD. The indium ion adsorption selectivity in the artificial ITO solution by PVGD and IPVGD was excellent, and other ions were adsorbed only slightly.

关键词： Poly(Vinyl phosphonic Acid-co-glycidyl Methacrylate-co-divinyl Benzene) PVGD Containing an Iminodiacetic Acid Group Bifunctional Cation Exchanger Indium Tin Oxide Indium Adsorption

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Chemical constituents and antibacterial activities of Aspidistra typica

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Chinese Journal of Natural Medicines 2018年第6期16卷 465-470页

作者： LIANG Xiao-Xia KONG Lin-Xi FEI Wen-Bo HE Min Natural Medicine Research Center College of Veterinary Medicine Sichuan Agricultural University

In the present investigation, we carried a phytochemical study of an ethanol-soluble extract from the root barks of Aspidistra typica Baill., a traditional food and herb medicine, leading to the isolation of four different kinds of compounds, including one benzene substituted coumarin, two organic phosphonic compounds, and one xanthone. The novel benzene substituted coumarin typicacoumarin A(1) was a new type of coumarin, and the two new organic phosphonic compounds, typicalphosphine A(2) and typicalphosphine B(3) were isolated for the first time, and their structures were elucidated by spectral techniques, viz.1 D, 2 D NMR spectra and HR-ESI-MS. The xanthone compound typicaxanthone A(4) was discovered from nature for the first time. The two new organic phosphonic chlorides(2, 3) showed stronger antibacterial activities, which were comparable to berberine hydrochloride. And typicaxanthone A(4) showed much stronger antibacterial activity against Escherichia coli ATCC-25922 bacterial strain, while typicacoumarin A(1) showed moderate antibacterial activities, weaker than berberine hydrochloride.

关键词： Aspidistra typica Benzene substituted coumarin Organic phosphonic compounds Xanthone Antibacterial activity

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