中国化学快报

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Design, synthesis and in vitro evaluation of mono (2, 2, 2-trifluoroethyl) esters, mono L-amino acid ester prodrugs of acyclic nucleoside phosphonates as anti-HBV agents

Xiao Zhong Fu, Yu Ou, Jan Xin, Yu She Yang

中国化学快报. 2011, 22(12): 1387-1390. https://doi.org/10.1016/j.cclet.2011.09.005

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A series of novel mono (2, 2, 2-trifluoroethyl) esters, mono L-amino acid ester prodrugs of acyclic nucleoside phosphonates was synthesized and their in vitro anti-HBVactivity was evaluated in HepG 2 2.2. 15 cells. Compound 1d exhibited more potent anti-HBV activity and lower cytotoxicity than those of adefovir dipivoxil and alamifovir (MCC-478) with EC₅₀ and CC₅₀ values of 0.01 μmol/L and >8000 μmol/L respectively.

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Sulfamic acid as a cost-effective and recyclable solid acid catalyst for Friedel-Crafts alkylation of indole with α,β-unsaturated carbonyl compound and benzyl alcohol

Jing Yang, Juan Zhang, Tian Tian Chen, De Mei Sun, Ji Li, Xue Fen Wu

中国化学快报. 2011, 22(12): 1391-1394. https://doi.org/10.1016/j.cclet.2011.06.006

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Sulfamic acid was proved to be a cost-effective and recyclable catalyst for Friedel-Crafts type reaction of indole with α, β-unsaturated carbonyl compound and benzyl alcohol. Various indoles, α, β-unsaturated carbonyl compounds and a benzyl alcohol were successfully used in this type of reaction, and the corresponding products were obtained in good to excellent yields.

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An approach to synthesis of (Z)-2-chloro-l,3-diarylpropen-l-ones by Vilsmeier reagent (bis-(trichloromethyl) carbonate/DMF)

Yi Yi Weng, Jian Jun Li, Wei Ke Su

中国化学快报. 2011, 22(12): 1395-1398. https://doi.org/10.1016/j.cclet.2011.07.006

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A series of (Z)-2-chloro-l, 3-diarylpropen-l-ones were unexpectedly synthesized in moderate yields by treatment of easily available 2, 3-epoxy-l, 3-diarylpropan-1 -ones with Vilsmeier reagent, which was derived from bis (trichloromethyl) carbonate (BTC, triphosgene) and DMF. A possible mechanism was also proposed, where sequential ring-opening, halogenation and elimination reactions were involved.

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A facile synthesis of imino-protected cyclic guanidine derivatives from diamines

Jian Hai Yuan, Xiao Xiao Yang, Hao Lin, De Xin Wang

中国化学快报. 2011, 22(12): 1399-1402. https://doi.org/10.1016/j.cclet.2011.07.008

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A convenient one-step synthesis of five-membered or six-membered imino-protected cyclic guanidine via an intramolecular ring-closure reaction of alkyl diamine (2a-2g) with 1, 3-diamino-protected methylisothiourea (la and 1b) was established and investigated. Amino guanidine such as 3-(2-aminoethyl)-l, 2-dibenzyloxycarbonylguanidine (4a) has been proved to be the intermediate of the reaction via utilizing mono-protected diamine as starting material. The intramolecular ring closure of 4a results in 2-benzyloxycarbonyliminoimidazolidine (3a). This new one-step synthesis has advantages of simple condition, easy workup procedure and reasonable yield.

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An efficient and convenient method for preparation of disulfides from thiols using air as oxidant catalyzed by Co-Salophen

Pin Ji Chai, Yong Shu Li, Cheng Xia Tan

中国化学快报. 2011, 22(12): 1403-1406. https://doi.org/10.1016/j.cclet.2011.06.007

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Disulfides have been synthesized by oxidation of thiols using air as oxidant catalyzed by Co-Salophen with high yields, mild and neutral conditions, and easy procedures of the catalyst. The products were confirmed by ¹H NMR and IR.

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Microwave assisted synthesis of novel Hantzsch 1,4-dihydropyridines, acridine-l,8-diones and polyhydroquinolines bearing the tetrazolo[1,5-a]quinoline moiety and their antimicrobial activity assess

Niraj K. Ladani, Divyesh C. Mungra, Manish P. Patel, Ranjan G. Patel

中国化学快报. 2011, 22(12): 1407-1410. https://doi.org/10.1016/j.cclet.2011.07.009

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Microwave assisted efficient Hantzsch reaction via four-component coupling reactions of tetrazolo[l, 5-a]quinoline-4-carbal-dehyde, dimedone/cyclohexane-l, 3-dione, ethyl/methyl acetoacetate and ammonium acetate was described as the preparation of tetrazolo[l, 5-a]quinoline based 1, 4-dihydropyridines, acridine-l, 8-diones and polyhydroquinolines. The process presented here is simple, rapid, environmentally welcoming and high yielding. All the derivatives were subjected to an in vitro antimicrobial screening against a representative panel of bacteria and fungi and results worth further investigations.

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Synthesis of a novel pyrrolo-benzoxaborole scaffold and its derivatization via Friedel-Crafts reaction catalyzed by anhydrous stannic chloride

Pu Hua Wu, Qing Qing Meng, Hu Chen Zhou

中国化学快报. 2011, 22(12): 1411-1414. https://doi.org/10.1016/j.cclet.2011.06.005

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A novel pyrrolo-benzoxaborole, 6-(pyrrol-l-yl)-l, 3-dihydro-l-hydroxy-2, 1-benzoxaborole, was synthesized with 27% overall yield over six steps from 2-bromo-1-methyl-4-nitrobenzene as starting material. Its derivatization was achieved via Friedel-Crafts reaction catalyzed by anhydrous stannic chloride with various acyl chlorides giving 3-acyl-1-phenylpyrroles as the main products.

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Un-catalyzed tandem Knoevenagel-Michael reaction for the synthesis of 4,4'-(arylmethylene)bis(1H-pyrazol-5-ols) in aqueous medium

Nilesh P. Tale, Girdharilal B. Tiwari, Nandkishor N. Karade

中国化学快报. 2011, 22(12): 1415-1418. https://doi.org/10.1016/j.cclet.2011.09.004

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An environmentally benign un-catalyzed one-pot synthesis of 4, 4'-(arylmethylene)bis (1H-pyrazol-5-ols) has been reported via tandem Knoevenagel-Michael reaction of aldehydes with two equivalents of 3-methyl-1-phenyl-1H-pyrazol-5 (4H)-one in aqueous medium.

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CuO nanoparticles:An efficient and recyclable nanocatalyst for the rapid and green synthesis of 3,4-dihydropyrano [c] chromenes

Hossein Mehrabi, Maryam Kazemi-Mireki

中国化学快报. 2011, 22(12): 1419-1422. https://doi.org/10.1016/j.cclet.2011.06.003

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Copper oxide nanoparticles showed excellent catalytic activity through three-component condensation reaction of aldehydes, malononitrile, and 4-hydroxycoumarin for the synthesis of 3, 4-dihyropyrano[c]chromenes in water medium in excellent yields and very short reaction times.

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Strontium chloride-catalyzed one-pot synthesis of 2, 3-dihydroquinazolin-4(1H)-ones in protic media

Min Wang, Ting Ting Zhang, Yan Liang, Jing Jing Gao

中国化学快报. 2011, 22(12): 1423-1426. https://doi.org/10.1016/j.cclet.2011.06.002

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A wide range of mono-and disubstituted 2, 3-dihydroquinazolin-4 (1H)-ones were obtained in high yields by condensation of isatoic anhydride, aldehydes with ammonium salts or primary amines in the presence of strontium chloride in aqueous ethanol under reflux.

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Efficient iodination of aromatic compounds using potassium ferrate supported on montmorillonite

Hoda Keipour, Mohammad A. Khalilzadeh, Bita Mohtat, Abolfazl Hosseini, Daryoush Zareyee

中国化学快报. 2011, 22(12): 1427-1430. https://doi.org/10.1016/j.cclet.2011.06.001

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Potassium ferrate impregnated on montmorillonite is a mild, cheap, and non-toxic reagent for the iodination of phenols, including naphthol, aromatic amines, and heterocyclic substrates in fair to excellent yields by a simple isolation procedure.

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Mononitration of phenol derivatives by guanidinium nitrate and silica sulfuric acid under mild conditions

Arash Ghorbani-Choghamarani, Hamid Goudarziafshar, Mohsen Nikoorazm, Zahra Naseri

中国化学快报. 2011, 22(12): 1431-1434. https://doi.org/10.1016/j.cclet.2011.07.012

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A mixture of guanidinium nitrate and silica sulfuric acid acts as mild and heterogeneous media for the efficient mono nitration of phenolic compounds in dichloromethane at room temperature.

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Iodine-mediated facile dehydrogenation of dihydropyridazin-3(2H)one

Vivek T. Humne, Shankaraiah G. Konda, Kamal Hasanzadeh, Pradeep D. Lokhande

中国化学快报. 2011, 22(12): 1435-1438. https://doi.org/10.1016/j.cclet.2011.07.019

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A new protocol for the dehydrogenation of dihydropyridazin-3 (2H)-one has been carried out by catalytic amount of iodine in dimethyl sulphoxide in good yield with easy workup.

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Facile synthesis of N-6 adenosine modified analogue toward S-adenosyl methionine derived probe for protein arginine methyltransferases

Wei Hong, James Dowden

中国化学快报. 2011, 22(12): 1439-1442. https://doi.org/10.1016/j.cclet.2011.09.007

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Chemically modified cellular co-factors that provide function, such as immobilization or incorporation of fluorescent dyes, are valuable probes of biological activity. A convenient route to obtain S-adenosyl methionine (AdoMet) analogues modified at N-6 adenosine to feature a linker terminating in azide functionality is described herein. Subsequent decoration of such AdoMet analogues with guanidinium terminated linkers leads to novel potential bisubstrate inhibitors for protein arginine methyltransferases, PRMTs.

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Solution-phase synthesis of a muramyl dipeptide analogue MDA

Nan Zhao, Yao Ma, Gang Liu

中国化学快报. 2011, 22(12): 1443-1446. https://doi.org/10.1016/j.cclet.2011.07.020

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The solution-phase synthesis of a muramyl dipeptide (MDP) analogue of N^α-[4-chlorocinnamoyl-L-alanyl-D-isoglutaminyl]-L-lysine (MDA, 2) is reported that possesses the features of easy feasibility, safety and low cost in large scale of synthesis.

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Synthesis and optical activity of isosorbide chiral derivative containing fluorocarbon group as chiral dopant in liquid crystal materials

Kong Liang Xie, Yin He Su, Chun Xiang Zhang

中国化学快报. 2011, 22(12): 1447-1450. https://doi.org/10.1016/j.cclet.2011.07.021

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Novel isosorbide derivative containing perfluorocarbon group, bi (perfluorooctanesulfonyl)isosorbide ester as chiral dopant in liquid crystal, was synthesized. Chemical structure was characterized by elemental analysis, FT-IR, ¹H NMR and 19F NMR. The optical texture of the mixture was observed by polarized optical microscopy (POM). Novel chiral dopant containing perfluorocarbon group had excellent optical activity. Its specific rotation and molar rotation were noticeable higher than those of bi (4-chloromethylbenzenecarbonic)isosorbide ester. The fluorocarbon group improved the molar rotation of chiral compound and did not affect optical rotation direction. The texture of the mixture added isosorbide derivative with fluorocarbon group showed the oily streak texture.

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Two new diterpene and sesquiterpene from Pteris dispar

Zhan Ping Gou, Nian Ci Liang, Jie Hou, Li Li, Yan Tian, Chang Yuan Wang, Xun Cui, Bao Jing Zhang, Xiao Chi Ma

中国化学快报. 2011, 22(12): 1451-1453. https://doi.org/10.1016/j.cclet.2011.09.001

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A new diterpene and a new sesquiterpene were isolated from Pteris dispar and identified on the basis of spectral data including 2D NMR. Compounds 1 and 2 showed potent cytotoxic activity against KB cell.

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A novel 8,4'-oxyneolignan diglycoside from Ligusticum sinensis

Jian Ping Ma, Chang Heng Tan, Da Yuan Zhu, Ling Jin

中国化学快报. 2011, 22(12): 1454-1456. https://doi.org/10.1016/j.cclet.2011.07.018

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A novel 8, 4'-oxyneolignan diglycoside, named ligusinenoside d (1), was isolated from the rhizomes of Ligusticum sinensis, together with five known analogues 2-6. The absolute configurations of 1 and 2 were elucidated by means of enzymatic hydrolysis and spectroscopic data.

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Bisabocurcumin, a new skeleton curcuminoid from the rhizomes of Curcuma longa L.

Yun Chuan Xiao, Jing Xie, Min Yu, Miao Liu, Jian Ran, Zhen Xi, Wei Li, Jing Huang

中国化学快报. 2011, 22(12): 1457-1460. https://doi.org/10.1016/j.cclet.2011.09.002

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A new skeleton bisabolane-type sesquiterpene curcuminoid, bisabocurcumin (1), along with 5 known compounds, curcumin (2), demethoxycurcumin (3), bidemethoxycurcumin (4), (1E, 4E)-l, 5-bis (4-hydroxy-3-methoxyphenyl)-penta-1, 4-dien-3-one (5), and (1E, 4E)-1-(4-hydroxy-3-methoxyphenyl)-5-(4-hydroxy phenyl-)-penta-1, 4-dien-3-one (6) were isolated from the rhizomes of Curcuma longa L. Their structures were determined on the basis of spectroscopic analysis. Bisabocurcumin (1) is firstly obtained from nature with a new skeleton combined by a bisabolane-type sesquiterpene and a 1, 7-diphenylheptanoid through a C-C bond.

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Two new dammarane-type sapogenins from Gynostemma pentaphyllum

Xia Li, Jia Qing Cao, Lin Shi, Yu Qing Zhao

中国化学快报. 2011, 22(12): 1461-1464. https://doi.org/10.1016/j.cclet.2011.09.003

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Two new sapogenins, named (20S, 24R)-3β, 20, 21β, 25-tetrahydroxy-21, 24-cyclodammarane (1) and 3β-hydroxyetio-17β-dammaranic acid (2), were isolated from the alkaline hydrolysate of Gynostemma pentaphyllum saponins. Their structures were elucidated by spectroscopic methods.

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Response surface methodology to optimize gradient ion chromatographic separation of inorganic anions and organic acids in tobacco leaves

Rui Qi Wang, Na Ni Wang, Jia Jie Zhang, Yan Zhu

中国化学快报. 2011, 22(12): 1465-1468. https://doi.org/10.1016/j.cclet.2011.06.011

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The separation optimization of nine organic and inorganic anions in tobacco leaves using gradient ion chromatography by response surface methodology was investigated. In order to achieve this goal the usefulness of the chromatographic response function (CRF) for the evaluation of the two different chromatographic performance goals (resolution and analysis time) was tested. The experiments were performed according to a Box-Behnken design response surface experimental design.

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Stripping voltammetric determination of Cd(Ⅱ) based on multiwalled carbon nanotube functionalized with 1-(2-pyridylazo)-2-naphthol

Alireza Mohadesi, Hadi Beitollahi, Mohammad Ali Karimi

中国化学快报. 2011, 22(12): 1469-1472. https://doi.org/10.1016/j.cclet.2011.06.010

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The present work has focused on the modification of multiwalled carbon nanotube with a ligand, l-(2-pyridylazo)-2-naphthol, and its potential application for the development of a new, simple and selective modified glassy carbon electrode for stripping voltammetric determination of Cd (Ⅱ). The analytical curve for Cd (Ⅱ) ions covered the linear range varying from 0.8 up to 220.4 μg L^-1. The limit of detection was found to be 0.1 μg L^-1, while the relative standard deviation (RSD) at 50.0 μg L^-1 was 1.8% (n=5). This modified electrode was successfully applied for determination of Cd (Ⅱ) in some water samples.

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Near-infrared spectra combined with partial least squares for pH determination of toothpaste of different brands

Yong Nian Ni, Wei Lin

中国化学快报. 2011, 22(12): 1473-1476. https://doi.org/10.1016/j.cclet.2011.07.010

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Near-infrared spectroscopy (NIR), which is generally used for online monitoring of the food analysis and production process, was applied to determine the internal quality of toothpaste samples. It is acknowledged that the spectra can be significantly influenced by non-linearities introduced by light scatter, therefore, four data preprocessing methods, including off-set correction, 1st-derivative, standard normal variate (SNV) and multiplicative scatter correction (MSC), were employed before the date analysis. The multivariate calibration model of partial least squares (PLS) was established and then was used to predict the pH values of the toothpaste samples of different brand. The results showed that the spectral date processed by MSC was the best one for predicting the pH value of the toothpaste samples.

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Surface enhanced Raman spectroscopy signals of mixed pesticides and their identification

Hui Rong Tang, Qing Qing Li, Yu Lan Ren, Jin Pei Geng, Peng Cao, Tao Sui, Xuan Wang, Yi Ping Du

中国化学快报. 2011, 22(12): 1477-1480. https://doi.org/10.1016/j.cclet.2011.07.013

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A rapid and sensitive method to identify and analyze mixed pesticides of tricyclazole, paraquat and flusilazole by surface-enhanced Raman scattering has been reported. Aqueous samples can be detected by SERS in low concentrations of 0.01 mg/L, 0.1 mg/L and 2.85 mg/L for individual tricyclazole, paraquat and flusilazole respectively. When mixing the three pesticides in the low concentrations, their characteristic peaks can still be identified from the SERS spectrum of the mixture.

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Surface interrogation mode of scanning electrochemical microscopy for oxidation study of adsorbed CO generated from serine on platinum

Chun Cui Huang, Qian Wang, De Bo Xiang, Hui Bo Shao

中国化学快报. 2011, 22(12): 1481-1484. https://doi.org/10.1016/j.cclet.2011.07.017

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We report a new method for detection and oxidation of adsorbed carbon monoxide (CO_(ads)) generated from serine on a polycrystalline platinum ultramicroelectrode (UME) by bromine (Br₂) using in situ surface interrogation (SI) mode of scanning electrochemical microscopy (SECM). In the SI mode, tip and substrate are both Pt UMEs, and CO_(ads) on Pt substrate, generated from serine, can be oxidized by the tip-generated Br₂ giving a positive response. Dosing CO_(ads) from serine instead of purging CO gas expands the newly introduced reaction of Br₂ with CO_(ads) and further enhances the hope to get rid of CO_(ads) on Pt for fuel cells.

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Determination of levels of adenosine phosphates in blood by ion chromatography

Pei Jin Xie, Ming Li Ye, Zhong Yang Hu, Guang Wen Pan, Yan Zhu, Jia Jie Zhang

中国化学快报. 2011, 22(12): 1485-1488. https://doi.org/10.1016/j.cclet.2011.09.008

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A new method was developed for simultaneous determination of levels of AMP, ADP and ATP in blood by anion-exchange chromatography. The three adenosine phosphates were separated by Dionex IonPac AG18 (50 mm×4 mm) guard column and IonPac AS18 (250 mm×4 mm) analytical column using a gradient method and detected with a suppressed conductivity detector. The detection limits (S/N=3) of AMP, ADP and ATP were 38, 47, 108 ng/L, respectively. The relative standard deviations of retention time, peak area and peak height were all less than 1.87% and a good linear relationship was obtained. This method was applied to analyze human blood samples.

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Synthesis of a novel water-soluble polymeric UV-absorber for cotton

Wei Ma, Xue Jiang, Yong Liu, Bing Tao Tang, Shu Fen Zhang

中国化学快报. 2011, 22(12): 1489-1491. https://doi.org/10.1016/j.cclet.2011.07.005

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A water-soluble polymeric UV-absorber with polyvinylamine as backbone and benzotriazole type UV absorber as anti-UV functional group was synthesized by grafting brominated (2'-acetoxy-5'-methylphenyl)-2H-benzotriazole onto polyvinylamine. The intermediates and synthesized polymeric UV absorber were characterized by ¹H NMR, MS, IR and UV spectroscopy. The finishing properties of the polymeric UV absorber on cotton were investigated to show good UV protection property and wash fastness.

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Syngas production in a novel perovskite membrane reactor with co-feed of CO₂

Yan Ying Wei, Liu Huang, Jun Tang, Ling Yi Zhou, Zhong Li, Hai Hui Wang

中国化学快报. 2011, 22(12): 1492-1496. https://doi.org/10.1016/j.cclet.2011.05.040

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Partial oxidation of methane (POM) co-fed with CO₂ to syngas in a novel catalytic BaCo_0.6Fe_0.2Ta_0.2O_3-δ oxygen permeable membrane reactor was successfully reported. Adding CO₂ to the partial oxidation of methane reaction not only alters the ratio of CO/H₂, but also increases the oxygen permeation flux and CH₄ conversion. Around 96% CH₄ conversion with more than 93% CO₂ conversion and 100% CO selectivity is achieved, which shows an excellent reaction performance. A steady oxygen permeation flux of 15 mL/ (cm² min) is obtained during the 100-h operation, which shows good stability as well.

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Phase behavior of binary system of bromobenzene-chlorobenzene confined in SBA-15 and MCM-41

Xiao Zheng Lan, Hai Rong Pei, Chuan Xian Cheng

中国化学快报. 2011, 22(12): 1497-1500. https://doi.org/10.1016/j.cclet.2011.07.007

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Phase behavior of binary system of bromobenzene-chlorobenzene (C₆H₅Br-C₆H₅Cl) confined in SBA-15 and MCM-41 (pore diameter 8 nm, 3.8 nm, respectively) has been investigated by means of differential scanning calorimetry (DSC). Phase diagram of C₆H₅Br-C₆H₅Cl system confined in SBA-15 is a type of the complete miscible both in liquid and solid state, the same phase behavior as the bulk system. However, the phase diagram comprises only one boundary line, which is shifted down 22-36 K with respect to the bulk system. C₆H₅Br, C₆H₅Cl or the mixture within nanopores of MCM-41 is nonfreezing. The different phase behavior of the system confined in SBA-15 and MCM-41 is thought mainly due to the relative size of pore to molecule.

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Catalytic effect of lucunary heteropolyanion containing molybdenum and tungsten atoms on decolorization of direct blue 71

Masoumeh Tabatabaee, Maria Roozbeh, Mandana Roozbeh

中国化学快报. 2011, 22(12): 1501-1504. https://doi.org/10.1016/j.cclet.2011.07.016

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In this research, a lucunary Keggin structure,[PMO₂W₉0₃₉]^7- was selected as an efficient homogenous catalyst for degradation of an azo dye (direct blue 71) and a simple method was developed for degradation of DB71. The method is based on the oxidation of azo dye in the presence of a lucunary Keggin form of polyoxometalates, K₇[PMO₂W₉O₃₉]·19H₂O, as a homogenous catalyst at room temperature. The reaction is monitored spectrophotometrically by measuring the absorbance of dye at λ=585 nm. Some parameters including concentration of catalyst, concentration of H₂O₂, pH and reaction time were investigated and optimized. Results show that K₇[PMO₂W₉O₃₉]·19H₂0 is more efficient in the presence of hydrogen peroxide. Degradation of dye in the presence of the catalyst and H₂O₂ could lead to the disappearance approximately 65% of dye after 60 min. But degradation for the same experiment performed in the absence of catalyst or in the absence of H₂O₂ was 22% or 5% respectively. Approximately 87% azo dyes has been eliminated after 90 min in the presence of catalyst, H₂O₂ and optimize conditions (0.6 g/L of K₇[PMO₂-W₉O₃₉]·19H₂O, 0.08 mol/L hydrogen peroxide and room temperature).

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Poly(2-acetoxyethyl methacrylate)/polystyrene latex interpenetrating polymer networks with well-defined phase-separated structure

Tao Wang, Shan Shi, Li Na Bian, Li Min Zhou, Li Qun Zhao, Shin Ichi Kuroda

中国化学快报. 2011, 22(12): 1505-1508. https://doi.org/10.1016/j.cclet.2011.06.004

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A series of poly (2-acetoxyethyl methacrylate)/polystyrene (PAEMA/PS) latex interpenetrating polymer networks (LIPNs) were prepared by seeded soap-free emulsion polymerization of styrene on the crosslinked PAEMA seed particles using an oil-soluble initiator. These PAEMA/PS LIPNs showed a well-defined phase-separated structure with PS phase dispersing in continuous PAEMA phase. The domain size of PS phase was found to depend on the crosslinking degree of PAEMA seed particles and the amount of second-stage styrene monomer.

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In situ generation of biodegradable poly(p-dioxanone) micro-particles by polymerization in supercritical carbon dioxide

Tian Qiang Wang, Xiu Li Zhao, Jian Yuan Hao

中国化学快报. 2011, 22(12): 1509-1512. https://doi.org/10.1016/j.cclet.2011.07.011

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Ring-opening suspension polymerization of p-dioxanone (PDO) in supercritical carbon dioxide (scCO₂) was investigated in the presence of poly (caprolactone)-perfluropolyether-poly (caprolactone) (PCL-PFPE-PCL). The molecular weight, yield and particle morphology of poly (p-dioxanone) (PPDO) were studied. The stabilizer was effective to stabilize the ring-opening polymerization (ROP) of PDO in scCO₂, leading to the formation of resorbable microparticles in a "one pot" procedure. The mean size of PPDO microparticles obtained from suspension polymerizations was sensitive to the rate of agitation and the stabilizer concentration. The method to generate PPDO microparticles has overcome its unprocessable drawback with common organic solvents and provided new product form for biomedical applications.

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2011年, 第22卷, 第12期　刊出日期：2011-12-20

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2011年, 第22卷, 第12期 刊出日期：2011-12-20

2011年, 第22卷, 第12期　刊出日期：2011-12-20