中国化学快报

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A new free recoverable and reusable mono-alkaloid-type ligand and its use in preparation of ethyl (2R,3S)-2,3-dihydroxy-3-phenylpropionate

Qiao Feng Wang, Hui Chen, Yan Zhao, Xiao Ye Li, Sheng Yong Zhang

中国化学快报. 2009, 20(07): 763-766. https://doi.org/10.1016/j.cclet.2009.02.018

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A new free recoverable and reusable mono-alkaloid-type ligand has been synthesized by a simple method. With highly polar groups, the ligand can be recycled and reused eight times to prepare ethyl (2R, 3S)-2, 3-dihydroxy-3-phenylpropionate with high yield and ee via asymmetric dihydroxylation (AD) reaction.

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Synthesis and mesomorphic properties of new Schiff base esters with different alkyl chains

Sie Tiong Ha, Lay hoon Ong, Siew Teng Ong, Guan Yeow Yeap, Joanna Pik Wan Wong, Teck Ming Koh, Hong Cheu Lin

中国化学快报. 2009, 20(07): 767-770. https://doi.org/10.1016/j.cclet.2009.01.011

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A new series of Schiff base esters, 4-(dimethylamino)benzylidene-4'-alkanoyloxyanilines containing even number of carbons at the end group of the molecules (C_n-1 H_2n-1COO, n=6, 8, 10, 12, 14, 16, 18) were synthesized. The present compounds were monotropic liquid crystals. It was also found that the end groups of the molecules had effect on the mesomorphic properties.

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A novel synthesis of 5-aryl-3-cyano-2-pyridones by using vinamidinium salts

Xue Hui Zhang, Wu Zhong, Xing Zhou Li, Song Li

中国化学快报. 2009, 20(07): 771-774. https://doi.org/10.1016/j.cclet.2009.02.016

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A variety of vinamidinium salts were condensated with cyanoacetamide in refluxing methanol that contained sodium methoxide to produce 5-aryl-3-cyano-2-pyridones in good yield. Simple experimental conditions were used to prepare ten different 5-aryl-3-cyano-2-pyridones, four of which are new compounds.

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Asymmetric synthesis of pedamide using I₂-induced heterocyclization to construct the skeleton

De Gang Liu, Ji Jun Xue, Zhi Xiang Xie, Li Ping Wei, Hua Bing Zhang, Ying Li

中国化学快报. 2009, 20(07): 775-778. https://doi.org/10.1016/j.cclet.2009.03.026

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An alternative approach to synthesize pedamide, a key building block of pederin was described. Iodine-induced asymmetric heterocyclization was used as the key step to construct the skeleton, a tetrahydropyran ring with three chiral centers. Brown's asymmetric allylation and Lewis acid-mediated allylation were investigated to introduce chains and chiral alcohols. Sharpless dihydroxylation decorated the side chain. And high optically pure target was obtained by removing the epimers formed in these reactions on column chromatography.

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Silica supported ammonium dihydrogen phosphate (NH₄H₂PO₄/SiO₂):A mild, reusable and highly efficient heterogeneous catalyst for the synthesis of 14-aryl-14-H-dibenzo[a,j]xanthenes

Shahnaz Rostamizadeha, Ali Mohammad Amania, Gholam Hossein Mahdavinia, Nasrin Shadjoua

中国化学快报. 2009, 20(07): 779-783. https://doi.org/10.1016/j.cclet.2009.03.016

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Silica supported ammonium dihydrogen phosphate (NH₄H₂PO₄/SiO₂) is found to be a recyclable heterogeneous catalyst for a rapid and efficient synthesis of various aryl-14-H-dibenzo[a,j]xanthenes with excellent yields under solvent-free conditions. The present methodology offers several advantages such as excellent yields, simple procedure, short reaction times and milder conditions.

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Microwave-assisted chemoselective copper-catalyzed amination of o-chloro and o-bromobenzoic acids using aromatic amines under solvent free conditions

Yaghoub Sarrafi, Manijeh Mohadeszadeh, Kamal Alimohammadi

中国化学快报. 2009, 20(07): 784-788. https://doi.org/10.1016/j.cclet.2009.02.013

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Copper-catalyzed synthesis of N-aryl anthranilic acid derivatives using effective amination of 2-chloro and 2-bromobenzoic acid under microwave irradiation is reported. Some of the advantages of this method are high chemoselectivity, short reaction times, ease of work up procedure and elimination of the need for acid protection.

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Synthesis of 6-sulfamoyl-4-oxoquinoline-3-carboxylic acid derivatives as integrase antagonists with anti-HIV activity

Zai Gang Luo, Cheng Chu Zeng, Lei Fu Yang, Hong Qiu He, Cun Xin Wang, Li Ming Hu

中国化学快报. 2009, 20(07): 789-792. https://doi.org/10.1016/j.cclet.2009.03.014

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A series of novel 6-sulfamoyl-4-oxoquinoline-3-carboxylic acids derivatives have been synthesized and screened for HIV integrase inhibition activity. Their structures were confirmed by ESI-MS,¹H NMR and ¹³C NMR.

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Microwave-assisted synthesis of asymmetric thiocarbonohydrazones under solvent-free conditions

Qing Han Li

中国化学快报. 2009, 20(07): 793-796. https://doi.org/10.1016/j.cclet.2009.03.013

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Six new asymmetric thiocarbonohydrazones 3a-3f were synthesized from following steps:firstly hydrazine hydrate reacted with carbon disulfide to form thiocarbonohydrazide (1) under microwave irradiation. Then compound (1) reacted with ketone and different aldehydes step by step to give 3a-3f with excellent yields under solvent-free conditions using microwave irradiation. Their structures have been determined by elemental analysis, IR, MS and ¹H NMR data.

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One-pot-synthesis of novel cinchonine-based phosphites

Qiao Feng Wang, Xue Ying Liu, Xiang Yang Qin, Xiao Ye Li, Sheng Yong Zhang

中国化学快报. 2009, 20(07): 797-799. https://doi.org/10.1016/j.cclet.2009.02.015

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Cinchonine was employed as backbone for the synthesis of novel phosphite compounds with diol substituents. These monophosphinites were provided in one pot with the yields ranged from 63% to 75%. Their structures were confirmed byNMR spectroscopy and HRMS.

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Synthesis and identification of dinitro-and diamino-terephthalic acid

M. Ghaemy, H. Mighani

中国化学快报. 2009, 20(07): 800-804. https://doi.org/10.1016/j.cclet.2009.01.021

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Dinitroterephthalic acid (DNTPA) and diaminoterephthalic acid (DATPA) were prepared in 85% and 75% yields, respectively.These compounds were characterized by using FTIR and ¹HNMR. DATPA can be used as a monomer for the preparation of polyesters and polyamides.

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Stereoselective cycloaddition of N-acyliminium cations with α,β-unsaturated ketones and esters

Ling Feng Qian, Yue Hua Zhou, Wei Zhang

中国化学快报. 2009, 20(07): 805-808. https://doi.org/10.1016/j.cclet.2009.03.006

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The cycloaddition of N-acyliminium cations with some deactivated alkenes such as α,β-unsaturate ketones and esters has been investigated. In most cases, the N-acyliminium cations produced from 3-hydroxy-2-arylisoindol-1-ones in the presence of BF₃·OEt₂ could be reacted with α,β-unsaturated ketones and esters to afford stereoselectively the cycloaddition products 6-acylisoindolo[2,1-a] quinolin-11-ones in moderate to high yields.

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Synthesis and anti-tumor activity of all-trans retinoic acid derivatives

Juan Shen, Jing Bo Shi, Fei Hu Chen, Yuan Wang, Jing Jing Ruan, Yan Huang

中国化学快报. 2009, 20(07): 809-811. https://doi.org/10.1016/j.cclet.2009.01.041

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A series of retinoate and retinamide derivatives were designed, synthesized, and their anti-tumor activities were investigated in NB4 by MTT and flow cytometry assays (FCM). All compounds showed cytotoxicity, especially compounds 1a and 1d exhibited a higher cytotoxicity than other derivatives and all-trans retinoic acid (ATRA). Furthermore, compound 1d could induce NB4 cell lines differentiation efficiently.

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Solar thermochemical reactions Ⅲ:A convenient one-pot synthesis of 1,2,4,5-tetrasubstituted imidazoles catalyzed by high surface area SiO₂ and induced by solar thermal energy

Ramadan A. Mekheimer, Afaf M. Abdel Hameed, Seham A. A. Mansour, Kamal Usef Sadek

中国化学快报. 2009, 20(07): 812-814. https://doi.org/10.1016/j.cclet.2009.02.017

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A simple, convenient and efficient method for the synthesis of 1,2,4,5-tetrasubstituted imidazole derivatives using benzoin, an aromatic aldehyde, an aromatic amine in the presence of ammonium acetate catalyzed by high surface area SiO₂ and induced by free solar thermal energy was reported.

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A novel flavonoid from the root of Macrothelypteris torresiana (Gaud.) Ching

Ying Tang, Wei Fang, Yun Tao Ma, Ya Ling Cai, Jin Lan Ruan

中国化学快报. 2009, 20(07): 815-816. https://doi.org/10.1016/j.cclet.2009.02.014

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Anovel flavonoid was isolated from the root of Macrothelypteris torresiana (Gaud.) Ching. The structure of the product was identified as 5, 7-dihydroxy-2-(1, 2-isopropyldioxy-4-oxocyclohex-5-enyl)-chromen-4-one on the ground of chemical and spectroscopic methods.

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A new cycloartane nortriterpenoid from Quercus variabilis Blume

Yan Xin, Ling Yun Jia, Jiu Zhi Yuan, Qi Shi Sun

中国化学快报. 2009, 20(07): 817-819. https://doi.org/10.1016/j.cclet.2009.03.011

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The leaves and stems of Quercus variabilis Blume afforded a new cycloartane nortriterpenoid, 3α-acetyloxy-4α, 14α-dimethyl9β, 19-cycloergost-24-oic acid (1), along with five known compounds (2-6). The structure of 1 was elucidated by 1D and 2D NMR and mass spectroscopy.

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A new spirostanol saponin from the rhizomes of Paris mairei

Xiao Xiao Liu, Lei Wang, Ting Ting Zhang, Qiang Wang

中国化学快报. 2009, 20(07): 820-822. https://doi.org/10.1016/j.cclet.2009.03.008

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A new spirostanol steroidal saponin, named maireioside A (1), together with three known steroidal saponins, hypoglaucin G (2),arisaponin I (3), and diosgenin-3-O-α-L-rhamnopyranosyl (1→4)-[α-L-rhamnopyranosyl (1→2)]-β-D-glucopyranoside (4), were isolated from the rhizomes of Paris mairei. The structure elucidation was accomplished by 1D and 2D NMR methods, HR-ESI-MS,and hydrolysis.

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Gindarudine, a novel morphine alkaloid from Stephania glabra

Deepak Kumar Semwal, Usha Rawat

中国化学快报. 2009, 20(07): 823-826. https://doi.org/10.1016/j.cclet.2009.03.002

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A novel morphine alkaloid, named gindarudine 1 has been isolated from ethanol extract of Stephania glabra tubers, together with four known alkaloids, palmatine, dehydrocorydalmine, stepharanine, and 8-(4'-methoxybenzyl)-xylopinine. Compound 1 was elucidated as 3,6-O,N-detrimethyl-10-hydroxy-1-methoxy-thebaine by means of spectroscopic data including 2D NMR studies.

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A novel phenylpropanoid glycoside from Callicarpa kwangtungensis Chun

Er Lei Xie, Guo Ping Zhou, Teng Fei Ji, Jun Wu, Gui Ping Yuan

中国化学快报. 2009, 20(07): 827-829. https://doi.org/10.1016/j.cclet.2009.03.022

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A novel phenylpropanoid glycoside, Callicarposide A has been isolated from the aerial parts of Callicarpa kwangtungensis Chun. The chemical structure is elucidated on the basis of spectral analysis.

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N²-(1-Methoxycarbonylethyl) guanosine, a new nucleoside coupled with an amino acid derivative from Amanita exitialis

Yu Lang Chi, Hui Ye Zhang, Jing Hua Xue, Jing Hao, Mei Fang Liu, Xiao Yi Wei

中国化学快报. 2009, 20(07): 830-832. https://doi.org/10.1016/j.cclet.2009.02.008

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A new purine nucleoside coupled with an amino acid derivative, N²-(1-methoxycarbonylethyl) guanosine 1, along with β-carbolineand russulaceramide was isolated from the fruiting bodies of Amanita exitialis, a newly described poisonous mushroom.Its structure was elucidated by spectroscopic methods. This is the first report of naturally occurring nucleosides in which an α-amino acid derivative is bonded through its α-amino nitrogen to a nucleobase aglycone by a C-N bond. The new compound was found to be toxic in brine shrimp lethality test (BST).

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A new bidesmoside triterpenoid saponin from Stauntonia chinensis

Dong Wang, Guo Ping Zhou, Yi Sheng Yang, Ya Lun Su, Teng Fei Ji

中国化学快报. 2009, 20(07): 833-835. https://doi.org/10.1016/j.cclet.2009.01.035

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A new bidesmoside triterpenoid saponin, named stauntoside C1 (1) has been isolated from Stauntonia chinensis. Its structure was established by means of spectral and chemical methods.

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Two new phenolic glycosides from the aerial parts of Androsace umbellata

Zhi Qi Yin, Cheng Hua Li, Ying Wang, Wen Cai Ye, Jian Zhang

中国化学快报. 2009, 20(07): 836-838. https://doi.org/10.1016/j.cclet.2009.03.023

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Two new phenolic glycosides, 2-hydroxy-4-O-β-D-glucopyranosylphenylacetic acid methyl acetate (1) and 2-hydroxy-4-O-β-Dglucopyranosylphenylacetic acid (2) were isolated from the aerial parts of Androsace umbellata. Their structures were elucidated by spectral techniques.

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Two new C-glucoside oxanthrones from Rumex gmelini

Zhen Yue Wang, Hai Peng Zhao, Yue Ming Zuo, Zong Quan Wang, Xian Ming Tang

中国化学快报. 2009, 20(07): 839-841. https://doi.org/10.1016/j.cclet.2009.03.004

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Two new C-glucoside oxanthrones, 6-methoxyl-10-hydroxyaloin A (1) and 6-methoxyl-10-hydroxyaloin B (2), were isolated from the roots of Rumex gmelini Turcz. Their structures were elucidated on the basis of spectroscopic techniques and chemical means.

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Two new prenylflavonoids from Epimedium sutchuenense

Chang Yuan Yu, Li Na Song, Guang Chen

中国化学快报. 2009, 20(07): 842-844. https://doi.org/10.1016/j.cclet.2009.03.003

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Two new prenylflavonoids, named sutchuenmedin A (1) and sutchuenmedin B (2), were isolated from the 70% EtOH extract of Epimedium sutchuenense. Their structures were determined from spectral analysis.

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Influence of pH value on microstructure and thermal stability of Ni-P electroless coating prepared in acidic condition

Xiao Wei Zhou, Hui Ming Jin, Lin Nan Zhang

中国化学快报. 2009, 20(07): 845-848. https://doi.org/10.1016/j.cclet.2009.01.040

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Three kinds of Ni-P electroless coatings were prepared in nickel sulphate solution at different pH values of 4.5, 5.5 and 6.5 with the purpose of ascertaining the influence of pH value on microstructure, internal stress statue and thermal stability of the coatings. Laser curvature (LC) method was used to measure the residual stress level in the coatings. Scanning electronic microscopy (SEM) and transmission electronic microscopy with energy dispersive spectrum (TEM/EDS) were used to examine the surface morphology and internal phase structure of the coatings, respectively. Differential scanning calorimeter (DSC) was used to analyze the phase transformation and thermal stability of the coatings at high temperature. Results showed the Ni-P coating prepared at pH 5.5 with nanocrystal mixed in amorphous structure had the worst thermal stability. The relatively higher stability of Ni-P coatings prepared at pH 4.5 and 6.5 was ascribed to the lower tensile stress level and much finer grain size, respectively. Besides, inverse Hall-Petch effect of annealing strengthening might also contribute to the integrity of Ni-P coating prepared at pH 6.5.

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Sensitive voltammetric determination of xanthinol nicotinate at a carbon nanotubes-ionic liquid gel modified electrode

Xiao Yu Bao, Yu Feng Tang, Hao Yang, Xin Chen

中国化学快报. 2009, 20(07): 849-851. https://doi.org/10.1016/j.cclet.2009.03.005

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The electrochemistry of xanthinol nicotinate (Xan) was studied by cyclic voltammetry at a glassy carbon electrode modified by a gel containing multi-walled carbon nanotubes (MWNTs) and room-temperature ionic liquid of 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF₆). The modified electrode exhibited good promotion to the electrochemical oxidation of Xan and an ultrasensitive electrochemical method was proposed for the determination of Xan. This method was successfully applied to the determination of Xan in Xan tablets.

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Synthesis of micron-sized hollow silica spheres with a novel mesoporous shell of MCF

An Feng Zhang, Yong Chun Zhang, Na Xing, Ke Ke Hou, Jing Wang, Xin Wen Guo

中国化学快报. 2009, 20(07): 852-856. https://doi.org/10.1016/j.cclet.2009.03.001

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Micron-sized hollow silica spheres whose shells are made up of mesocellular silica foams (MCFs) have been synthesized by one-pot sol-gel method in benzene/water/P123 emulsion. The material is characterized with SEM, TEM, BET and ²⁹Si MAS NMR.The results show that the MCFs of the unique shell of hollow silica spheres were connected by large windows with a narrow distribution of~10 nm in diameter, the inner space of the hollow sphere is accessible. And the formation mechanism of the hollow silica spheres is proposed.

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Synthesis and characterization of CePO₄ nanowires via microemulsion method at room temperature

Yi Bin Yin, Xin Shao, Li Min Zhao, Wen Zhi Li

中国化学快报. 2009, 20(07): 857-860. https://doi.org/10.1016/j.cclet.2009.02.020

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Uniform CePO ₄ nanowires with diameter of about 25 nm were synthesized by the water-in-oil microemulsion method at room temperature from cerous chloride, sodium orthophosphate, sodium chloride, cyclohexane, Triton X-100 and cetyltrimethyl ammonium bromide (CTAB). The crystal structure and morphology of the nanowires were characterized by XRD and TEM,respectively. The UV-vis absorption was detected by UV-vis spectrophotometer techniques. The results showed that as-prepared nanowires with the hexagonal phase have obvious quantum confinement effect and semiconductor characteristics. Little sodium chloride could play a positive role on the formation of CePO ₄ nanowires at room temperature. The size of the nanowires can be controlled through the joining of sodium chloride.

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Formation of infinite 2D water layers in a crystal host

Cai Hua Zhou, Li Jun Zhou, Long Tang, Yao Yu Wang

中国化学快报. 2009, 20(07): 861-864. https://doi.org/10.1016/j.cclet.2009.03.030

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A self-assembled, (H₂O)₃₈ cluster stabilized by a mono-nuclear copper(Ⅱ) complex 1 namely {[Cu(phen)₂(CO₃)]·7H₂O} is characterized by X-ray diffraction studies. The adjacent (H₂O)₃₈ clusters connect together resulting in an infinite 2D water layer structure. The water morphology is stable at room temperature, but upon thermal decomposition, the water loss is irreversible.

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Highly active catalyst for vinyl acetate synthesis by modified activated carbon

Chun Yan Hou, Liang Rong Feng, Fa Li Qiu

中国化学快报. 2009, 20(07): 865-868. https://doi.org/10.1016/j.cclet.2009.01.027

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A new zinc acetate catalyst which was prepared from modified activated carbon exhibited extreme activity towards the synthesis of vinyl acetate. The activated carbon was modified by nitric acid, vitriol and peroxyacetic acid (PAA). The effect on specific area,structure, pH and surface acidity groups of carriers by modification was discussed. Amount of carbonyl and carboxyl groups in activated carbon was increased by peroxyacetic acid treatment. The productivity of the new catalyst was 14.58% higher than that of catalyst prepared using untreated activated carbon. The relationship between amount of carbonyl and carboxyl groups (m) and catalyst productivity (P) was P=1.83+2.26×10^-3*e^3.17m. Reaction mechanism was proposed.

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Preparation and characterization of mesoporous tetragonal sulfated zirconia

Chun Xia He, Bin Yue, Ji Fang Cheng, Wei Ming Hua, Ying Hong Yue, He Yong He

中国化学快报. 2009, 20(07): 869-872. https://doi.org/10.1016/j.cclet.2009.02.021

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Mesoporous tetragonal sulfated zirconia with high surface area and narrow pore-size distribution was prepared using Zr(O-nPr)₄as zirconium precursor, sulfuric acid as sulfur source and triblock copolymer poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol) (P123) as the template. The samples were characterized by X-ray diffraction, N₂ sorption, TEM, and NH₃-TPD. A phase transformation from monoclinic sulfated zirconia to tetragonal sulfated zirconia is observed. The product showsstrong acidity.

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Synthesis and helical twisting property of polymerizable chiral dopant with temperature-dependent solubility in liquid crystal

Wei Huang, Yu Bo Cao, Xiao Guang Zhang, Fa Sheng Li, Huai Yang

中国化学快报. 2009, 20(07): 873-876. https://doi.org/10.1016/j.cclet.2009.03.019

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In this study, right-handed dicinnamate isosorbide was synthesized via the esterification reaction between optically active isosorbide and cinnamate. The chiral dopant was characterized by FT-IR,¹H NMR, elemental analysis, SEM, UV absorption spectrum. After dissolving in a nematic liquid crystal mixture, the chiral dopant exhibited a temperature-dependent solubility in the chiral nematic liquid crystal mixture. Meanwhile, a relatively high value of helical twisting power of the polymerizable chiral dopant was determined. The results show that the chiral dopant has great potential in achieving a polymer stabilized chiral nematic liquid crystal film with a broad-band selective reflection.

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Study of the structure and the mechanical properties of dynamically cured PP/MAH-g-SEBS/epoxy blends

Xue Liang Jiang, Yin Xi Zhang

中国化学快报. 2009, 20(07): 877-880. https://doi.org/10.1016/j.cclet.2008.12.054

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A new method concerning with the simultaneous reinforcing and toughening of polypropylene (PP) was reported. Dynamical cure of the epoxy resin was successfully applied in the PP/maleic anhydride-grafted styrene-ethylene-butylene-styrene (SEBS) triblock copolymer, and the obtained blends named as dynamically cured PP/MAH-g-SEBS/epoxy blends. The stiffness toughness of the blends are in a good balance, and MAH-g-SEBS was acted as not only an impact modifier but also a compatibilizer.The structure of the dynamically cured PP/MAH-g-SEBS/epoxy blends is the embedding of the epoxy particles by the MAH-SEBS.

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Copolymerization of (10-oxo-10-hydro-9-oxa-10λ⁵-phosphaphenanthrene-10-yl)-methyl acrylate with styrene

Li Yan, Jian Ping Liu, Nan Zheng, Yu Bin Zheng

中国化学快报. 2009, 20(07): 881-884. https://doi.org/10.1016/j.cclet.2009.01.036

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A phosphorus-containing monomer (10-oxo-10-hydro-9-oxa-10λ⁵-phospha-phenanthrene-10-yl)-methyl acrylate (M₁) was copolymerized with styrene to give a potential flame retardant copolymer of high thermal stability. The structures of monomer and copolymer were characterized by FT-IR and ¹H NMR measurements. The reactivity ratios for free-radical of the monomer (M₁) and styrene (M₂) were studied. The calculated results are as follows:r₁=0.225, r₂=0.503; Q₁=0.413, e₁=0.476; azeotropic point=0.37. TGA and DTG curves indicated that M₁ is a potential flame retarding monomer for styrenic polymers.

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New thermally stable polyesters based on 2,5-pyridinedicarbonyl dichloride and aromatic diols:Synthesis and characterization

Hossein Nasr Isfahani, Khalil Faghihi

中国化学快报. 2009, 20(07): 885-888. https://doi.org/10.1016/j.cclet.2009.01.014

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Six new thermally stable polyesters (4a-f) were synthesized through the solution polycondensation reaction of 2,5-pyridine dicarbonyldichloride (2) with six aromatic diols in N,N'-dimethyl acetamide (DMAc) solution and in the presence of pyridine as a base. The polycondensation reactions produce a series of new polyesters (4a-f) in high yields, and inherent viscosity between 0.30 and 0.55 dL/g. The resulting polyesters were characterized by elemental analysis, viscosity measurements, thermal gravimetric analysis (TGA and DTG), solubility test, Fourier transform infrared (FT-IR) spectroscopy and gel permeation chromatography (GPC).

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2009年, 第20卷, 第07期　刊出日期：2009-07-20

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2009年, 第20卷, 第07期 刊出日期：2009-07-20

2009年, 第20卷, 第07期　刊出日期：2009-07-20