Chinese Journal of Chemistry

Cover image for Chinese Journal of Chemistry

June, 2011

Volume 29, Issue 6

Pages 1063–1293

  1. Contents

    1. Top of page
    2. Contents
    3. Full Papers
    4. Note
  2. Full Papers

    1. Top of page
    2. Contents
    3. Full Papers
    4. Note
    1. Pharmacophore Screening on Piperidinecarboxamides Derivatives Based on GALAHAD and CoMFA Models (pages 1075–1083)

      Ming Liu, Qiangsan Wu and Prof. Dr. Wenxiang Hu

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190204

      Thumbnail image of graphical abstract

      Visual inspection of 3D contour maps were generated by CoMFA, which could provide a graphic guidance to the design of higher bioactive molecules. The steric contour plot of pharmacophore model 1 was displayed. The green contour indicated the regions where an increase in steric bulk would enhance the anticonvulsant activity; while the yellow contour denotes the areas where a decrease in steric bulk would enhance the anticonvulsant activity.

    2. Mechanism of Ethylene Migratory Insertion and Dimerization Catalyzed by δ-Alkyl Platinum Complexes–A DFT Study (pages 1084–1094)

      Yu Sheng, Zhiyuan Geng, Yongcheng Wang, Yuzhi Wang and Xiaojian Sun

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190205

    3. Liquid-phase α-Pinene Isomerization over Fe-doped Sulfated Zirconia Prepared by a Hydrothermal Treatment-assisted Process (pages 1095–1100)

      Jianfeng Liu, Jie Zhao, Changxi Miao, Yinghong Yue, Weiming Hua and Zi Gao

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190206

      Thumbnail image of graphical abstract

      A series of Fe-doped (0.5%–3%) sulfated zirconia have been prepared by a hydrothermal treatment- assisted process. The incorporation of small amounts of Fe into sulfated zirconia results in the increase of sulfate content and the number of acid sites, which is responsible for the enhanced activity of Fe-doped catalysts in comparison with the undoped one. Meanwhile, hydrothermal treatment helps to improve the activity of the catalyst.

    4. Thixotropy of Aqueous Suspensions Containing Mg-Al Hydrotalcite-like Compound and Low-substituted Cationic Starch: Comparison between Oscillatory Shear and Thixotropic Loop Measurements (pages 1101–1106)

      Yan Li, Haoyu Bi and Shuanglong Shen

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190207

      Thumbnail image of graphical abstract

      The thixotropic type of aqueous suspensions consisting of aluminum magnesium hydrotalcite-like compound (HTlc) and low-substituted cationic starch transforms from negative to positive and then to complex thixotropy with the increasing of the mass ratio (R=0–0.5) of HTlc.

    5. Pharmacophore Modeling and in Silico Screening Studies to Design Potential KDR Kinase Inhibitors (pages 1107–1113)

      Dan Xu, Haopeng Sun, Yadong Chen, Liping Sun and Prof. Dr. Qidong You

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190208

      Thumbnail image of graphical abstract

      A novel ligand-based pharmacophore model for KDR kinase was generated and validated. The model was used to screen the NCI database for new potential hit compounds.

    6. Chemical Stability, Ionic Conductivity of BaCe0.9−xZrxSm0.10O3−α and Its Application to Ammonia Synthesis at Atmospheric Pressure (pages 1114–1118)

      Xiaowen Wang, Jinling Yin, Jianhong Xu, Hongtao Wang and Guilin Ma

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190209

      Thumbnail image of graphical abstract

      A series of ceramics BaCe0.9−xZrxSm0.10O3−α (x=0.10, 0.15, 0.20, 0.30) were obtained through a co-precipitation route. Among the samples tested, the sample of x=0.20 exhibited both adequate conductivity and sufficient chemical stability. The sample was successfully applied to the ammonia synthesis at atmospheric pressure.

    7. An Investigation into the Magnetic Properties of Nickel Nano-grains Synthesized Via Thermal Decomposition Techniques (pages 1119–1123)

      Reihaneh Malakooti, Yalda Takhti and Roya Mirzajani

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190210

      Thumbnail image of graphical abstract

      Ni nanoparticles have been synthesized through hot-injection and heating-up methods. Effects of preparation routes on magnetic properties have been investigated.

    8. Synthesis, Structural Characterization, and Antimicrobial Activities of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) Complexes of Triazole-based Azodyes (pages 1124–1132)

      Abdalla M. Khedr, Mohamed Gaber and Eman H. Abd El-Zaher

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190211

      Thumbnail image of graphical abstract

      The synthesis and characterization of new transition metal complexes of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) with 3-(2-hydroxynaph-1-ylazo)-1,2,4-triazole (HL1) and 3-(2- hydroxy-3-carboxynaph-1-ylazo)-1,2,4-triazole (HL2) have been carried out. HL2 and its complexes were found to have moderate antimicrobial activities against Staphylococcus aureus (gram positive), Escherichia coli (gram negative) and Salmonella sp bacteria, and antifungal activity against Fusarium oxysporum, Aspergillus niger and Candida albicans. Also, in most cases, metallation increased the activity compared with the free ligand.

    9. Inactivation of Escherichia coli on Immobilized CuO/CoFe2O4-TiO2 Thin-Film under Simulated Sunlight Irradiation (pages 1133–1138)

      Jianhui Yan, Hao Chen, Li Zhang and Jinzhi Jiang

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190212

      Thumbnail image of graphical abstract

      Composite photocatalysts of CuO/CoFe2O4-TiO2 were successfully synthesized by a sol-gel method and fixed on ordinary tiles. The photosterilization of Escherichia coli was examined on CuO/CoFe2O4-TiO2 thin films under a xenon lamp irradiation. Disinfection data indicated that CuO/CoFe2O4-TiO2 composite photocatalysts have the much better photocatalytic activity than CuO/CoFe2O4 and TiO2. The optimized composition of the nanocomposites has been found to be mmath image:mmath image=3:7, with loadings ranging from 790 to 1400 mg/m2. The photocatalytic inactivated rate of E. coli (105 CFU/mL) reached 98.4% under the xenon lamp of 150 W within 30 min.

    10. Synthesis of Fan-Shaped C3 Molecule with Three Glycyrrhetinic Acid Units and Self-Assembly Properties (pages 1139–1142)

      Jun Hu, Libing Yu, Meng Zhang and Yong Ju

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190213

      Thumbnail image of graphical abstract

      A novel fan-shaped C3 molecule with three glycyrrhetinic acid units was synthesized via "click chemistry" in high yield and the self-assembly characteristics were studied in different mixed solvents.

    11. Significant Heterogeneous Carbonate Salt Catalyzed Acetylation of Alcohols via a Transesterification Process with Carbonate Salt-activated Alcohol 1H NMR Evidence (pages 1143–1148)

      Yan Xiong and Xueqiang Zhang

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190214

      Thumbnail image of graphical abstract

      High yields for esters have been achieved by heterogeneous catalysis of cesium carbonate. Cesium carbonate can be recovered and reused, and during four runs phenethylacetate is provided in high yields.

    12. Effect of Alkylaluminum Activators on Ethylene Trimerization Based on 2,5-DMP/Cr(III)/TCE Catalyst System (pages 1149–1153)

      Tao Jiang, Rongxin Ji, Hongxia Chen, Chengang Cao, Guoliang Mao and Yingnan Ning

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190215

      Thumbnail image of graphical abstract

      The effects of various cocatalyst on the catalytic performance in ethylene trimerization reactions were studied using a homogeneous 2,5-dimethylpyrrole (2,5-DMP)/Cr(III)/alkylaluminum/tetrachloroethane (TCE) catalyst system. The results show that the cocatalyst has significant effect in improving selectivity toward 1-hexene. Some specific interaction modes of alkylaluminum with active Cr species in the catalytic cycle were proposed.

    13. Activated Anilide in Heterocyclic Synthesis: Synthesis of New Dihydropyridines, Dihydropyridazines and Thiourea Derivatives (pages 1154–1162)

      Ibrahim S. A. Hafiz, Mahmoud M. M. Ramiz and Ahmed A. M. Sarhan

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190216

      Thumbnail image of graphical abstract

      A series of new dihydropyridines, butanamide, dihydropyridazines and thiourea derivatives have been prepared through the reactions of 3-aminopyridine (1) and N-(pyridin-3-yl)-3-(pyridin-3-ylimino)butanamide (3) with some electrophilic reagents, aryl diazonium salts and isothiocyanates. Elementary analysis, MS, IR, and 1H NMR spectra confirmed the identity of the products.

    14. Morpholine Catalyzed One-pot Multicomponent Synthesis of Compounds Containing Chromene Core in Water (pages 1163–1166)

      Majid M. Heravi, Masoumeh Zakeri and Narges Mohammadi

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190217

      Thumbnail image of graphical abstract

      A series of dihydropyrano[c]chromene was obtained via condensation of aldehyde, malononitrile and 4-hydroxycoumarin in water catalyzed by morpholine, as a one-pot reaction. The significance of our findings relates to reducing the use of organic solvents, potentially toxic and hazardous materials, as well as its simplicity, good yields, mild conditions, and lower costs.

    15. Investigation into the Regiochemistry of Some Pyrazoles Derived from 1,3-Dipolar Cycloaddition of Methyl Methacrylate with Some Nitrilimines: A Combined Theoretical and Experimental Study (pages 1167–1172)

      Mehdi Bakavoli, Farid Moeinpour, Abolghasem Davoodnia and Ali Morsali

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190218

      Thumbnail image of graphical abstract

      1,3-Dipolar cycloaddition between methyl methacrylate as dipolarophile and some nitrilimines which were generated in situ afforded the new pyrazoles. The regiochemistry and reactivity of these reactions has been investigated on the basis of density functional theory (DFT)-based reactivity indexes and activation energy calculations. The theoretical 13C NMR chemical shifts of the cycloadducts which were obtained by GIAO method were comparable with the observed values.

    16. Investigation of Reaction Mechanism of Amino Acids and Phosphorus Trichloride by 31P NMR and ESI-MS/MS (pages 1173–1179)

      Yanchun Cao, Shuxia Cao, Yali Xie, Xiangkun Zong and Yufen Zhao

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190219

      Thumbnail image of graphical abstract

      The reaction of amino acids and phosphorus trichloride in THF was studied by 31P NMR tracing and ESI-MS/MS. A series of hydridophoranes and cyclic dipeptides were obtained. The reaction presented interesting diversity and the reaction mechanism was proposed.

    17. Sodium Bisulfite: An Efficient Catalyst for Ether Formation via Dehydration of Aromatic/Aliphatic Alcohol (pages 1180–1184)

      Hui Wang, Xingfei Zhu, Yangning Lu, Yue Li and Xiang Gao

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190220

      Thumbnail image of graphical abstract

      Straightforward etherification of benzyl alcohols 1 via intermolecular dehydration can be efficiently catalyzed by sodium bisulfite under solvent-free conditions. In the presence of 0.3 mol% or 0.6 mol% amount of sodium bisulfite, symmetric and unsymmetric ethers are prepared from the corresponding alcohols in high yields (up to 95%). Etherification of benzhydryl alcohols is also discussed.

    18. Studies Directed toward Synthesis of the Structure Proposed for Stereocalpin A (pages 1185–1191)

      Yixian Huang and Prof. Dr. Yikang Wu

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190221

      Thumbnail image of graphical abstract

      The structure originally proposed for steroeocalpin A in the literature.

    19. gem-Dimethyl-bearing C-Glucosides as Sodium-glucose Co-transporter 2 (SGLT2) Inhibitors (pages 1192–1198)

      Yongheng Shi, Prof. Dr. Guilong Zhao, Yuanyuan Lou, Yuli Wang, Hua Shao, Wei Liu, Weiren Xu and Lida Tang

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190222

      Thumbnail image of graphical abstract

      A series of gem-dimethyl- bearing C-glucosides were designed and synthesized as SGLT2 inhibitors and evaluated in vivo with mice oral glucose tolerance test (OGTT).

    20. Synthesis of 1-Aryl-1H-indazoles via a Ligand-Free Copper- Catalyzed Intramolecular Amination Reaction (pages 1199–1204)

      Mingshan Gao, Xiujie Liu, Xianyang Wang, Qian Cai and Ke Ding

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190223

      Thumbnail image of graphical abstract

      A general synthesis of 1-aryl-1-H-indazoles from o-halogenated aryl aldehydes or ketones and aryl hydrazines was described. This protocol included an intermolecular condensation and a ligand-free copper-catalyzed intramolecular Ullmann-type coupling reaction.

    21. Synthesis of 1-Aryl-1H-indazoles via a Ligand-Free Copper- Catalyzed Intramolecular Amination Reaction (pages 1205–1210)

      Fengjuan Shen, Xiaoliu Li, Xiaojuan Zhang, Zhanbin Qin, Qingmei Yin, Hua Chen and Jinchao Zhang

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190224

      Thumbnail image of graphical abstract

      A series of novel dinucleosides linked by s-triazine were synthesized via the nucleophilic substitution reaction of amino nucleoside and cyanuric chloride in THF/H2O. The biological activities of these novel dinucleosides against HIV-RT, HeLa and A-549 cell lines in vitro were evaluated.

    22. An Efficient and Practical Synthesis of Dibenzo[d,f][1,3]-dioxepines from 2,2′-Dihydroxybiphenyl with Terminal Alkynes Catalyzed by Lewis Acid TiCl4 (pages 1211–1215)

      Haisheng Wu, Jin Yang and Prof. Dr. Lei Wang

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190225

      Thumbnail image of graphical abstract

      A synthetic strategy toward the cyclic addition of 2,2′-dihydroxybiphenyl to terminal alkynes has been developed using Lewis acid TiCl4 as catalyst. The reactions generated dibenzo[d,f][1,3] dioxepines derivatives in good yields with excellent regio-selectivity in the presence of catalytic amount of TiCl4 under mild reaction conditions.

    23. Validated Method for the Simultaneous Determination of Lisinopril, Pravastatin, Atorvastatin and Rosuvastatin in API, Formulations and Human Serum by RP-HPLC (pages 1216–1220)

      Sultana Najma, M. Saeed Arayne and Naveed Safila

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190226

      Thumbnail image of graphical abstract

      Present work was designed for the simultaneous determination of lisinopril in presence of pravastatin, atorvastatin, and rosuvastatin using RP-HPLC method.

    24. KF-Melamine Formaldehyde Resin (KF-MFR) as a Versatile and Efficient Heterogeneous Reagent for Aldol Condensation of Aldehydes and Ketones under Microwave Irradiation (pages 1221–1226)

      Ramin Rezaie, Mohammad Heidary, Mohammad Navid Soltani Rad and Somayeh Behrouz

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190227

      Thumbnail image of graphical abstract

      KF-Melamine formaldehyde resin (KF-MFR) was demonstrated to be a highly efficient heterogenious catalyst for cross-aldol condensation under microwave irradiation. In this synthest, various aldehydes and ketones were condensed together in the presence of supported KF on melamine-formaldehyde resin to afford different chalcone derivatives in good to excellent yields. KF-MFR proved to have unique termal and chemical resistance and can be reused for many consecutive runs without remarkable loss in catalytic activity.

    25. Synthesis of Triazole-Linked Amino Acid-Aryl C-Glycoside Hybrids via Click Chemistry as Novel PTP1B Inhibitors (pages 1227–1232)

      Jia Wang, Xiaopeng He, Lixin Gao, Li Sheng, Xiaoxin Shi, Jia Li and Guorong Chen

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190228

    26. Separation of Trivalent Samarium through Facilitated Stripping Dispersion Hollow Fiber Liquid Membrane Using p204 as Mobile Carrier (pages 1233–1238)

      Prof. Dr. Liang Pei, Liming Wang and Wei Guo

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190229

      Thumbnail image of graphical abstract

      A set of factors of separation of Sm(III) through stripping dispersion hollow fiber liquid membrane system (SDHFLM) were studied. When initial Sm(III) concentration was 1.00×10−4 mol/L, the separation rate of Sm(III) was up to 93.5% in 85 min. The kinetic equation was developed in terms of the law of mass diffusion and the theory of interface chemistry. The modeled results were in good agreement with the experimental data.

    27. Synthesis and Characterization of Nano-sized Zinc Oxide Coating on Cellulosic Fibers: Photoactivity and Flame-retardancy Study (pages 1239–1245)

      Moafi Hadi Fallah, Shojaie Abdollah Fallah and Mohammad Ali Zanjanchi

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190230

      Thumbnail image of graphical abstract

      We have investigated the effect of zinc oxide as a photocatalyst and durable flame-retardant on cellulosic fibers. Zinc oxide nanocrystals were successfully synthesized and deposited onto cellulosic fibers using sol-gel process at low temperature. The photocatalytic activity was tested by measuring the photodegradation of methylene blue under UV-Vis illumination.

    28. Solid-phase Extraction of β-Sitosterol from Oldenlandia diffusa Using Molecular Imprinting Polymer (pages 1246–1250)

      Tao Zhu, Changwan Yoon and Kyungho Row

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190231

      Thumbnail image of graphical abstract

      β-Sitosterol imprinted polymers were prepared for the selective extraction and analysis of β-sitosterol from Oldenlandia diffusa. This MIP cartridge used in solid phase extraction allowed interferences to be quickly washed away with selective retention of β-sitosterol. HPLC analysis of the MIP with a mobile phase of MeOH/ H2O/H3PO4 (99/1/0.1, pH=6.0) and the flow rate of 1.0 mL·min−1 showed good linearity for concentrations of β-sitosterol between 0.50–100.0 µg·mL−1. Recoveries ranged from 75.3% to 86.5% with inter- and intra-day relative standard deviations below 5%.

    29. Studies on the Element Characteristics of Nephrite Minerals from Different Deposits by GD-MS (pages 1251–1255)

      Siqinbilige, Rong Qian, Shangjun Zhuo and Fuxi Gan

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190232

      Thumbnail image of graphical abstract

      Four nephrite samples from different places were analyzed by glow discharge mass spectrometry (GD-MS). The GD-MS results revealed that characteristic elements of the nephrite minerals from same deposit were similar, and those from different deposits exhibited significant difference. These results could provide some important information for the determination of the accurate deposits of nephrite minerals.

    30. Flow Injection Chemiluminescence Determination of Puerarin in Pharmaceutical Preparations Using Eosin Y-Fenton System (pages 1261–1267)

      Zhuo Cai, Xian Zhang, Dengfeng Lu and Jingni Gan

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190234

      Thumbnail image of graphical abstract

      A strong chemiluminescence (CL) signal was observed when Eosin Y reacted with the hydroxyl radicals which were generated from Fenton reagent in acidic medium. The CL intensity was decreased obviously when puerarin was added to the reaction system and scavenged partially the hydroxyl radicals in the solution. The decrease extent of the CL intensity had a good stoichiometrical relationship with puerarin concentration. Based on this, a new FI-CL method was established for the quantitative determination of puerarin in pharmaceutical preparations.

    31. Determination of L-Cystine by a New Sensitive Cucurbit[7]uril/palmatine Probe (pages 1268–1272)

      Jiyuan Yang, Liming Du, Hao Wu, Yinxia Chang and Changfeng Li

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190235

      Thumbnail image of graphical abstract

      In the presence of cucurbit[7]uril (CB[7]), the CB[7] could react with palmatine, which served as a sensitive fluorescence probe, to form host-guest stable complexes and the fluorescence intensity of the complexes was greatly enhanced. The fluorescence intensity decreased linearly with an increasing number of L-cystine in the inclusion system. The experimental results show that there exists a competition between L-cystine and palmatine for the CB[7] hydrophobic cavity and L-cystine occupies the space of CB[7] cavity, leading palmatine molecules to be forced to reside in the aqueous environment. Based on this, a spectrofluorimetric method for the determination of L-cystine in aqueous solution in the presence of CB[7] was developed.

    32. Study on the Methods for Removing Sulfide Ion and Sulfate Radical from the Oilfield Sewage (pages 1273–1277)

      Ying Wang, Wanli Kang, Ying Wu and Xuehong Qi

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190236

      Thumbnail image of graphical abstract

      Some methods for removing sulfide were studied by adding the oxidizing substances. The addition of hydrogenperoxide in the solution makes it faster to remove sulfide than flowing air in it, although the removal of sulfide is still not complete. This removal is quick when ozone takes part in, and it will spend much time with the increased volume of solution. The extent of removing sulfide was mainly related to the oxidability of removed substances. The stronger the oxidability of oxidizing substances, the better the performance for sulfide removing. In addition, part of sulfate radical in oilfield sewage could be removed by nanofiltration membrane. Removal efficiency of sulfate radical is about 50%. The probability may be avoided that sulfate radical was reduced into sulfide by the sulfate-reducing bacteria (SRB) in sewage.

    33. Preparation and Characterization of Exfoliated Poly(ethyleneterephthalate)/Montmorillonite Nanocomposites Using Modified MMTs with Variable Content of Antimony Acetate (pages 1278–1284)

      Xiaoqun Wang, Yaqing Wang, Zhenlu Zhao, Xiaoguang Zhu, Cong Nie and Shanyi Du

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190237

      Thumbnail image of graphical abstract

      Poly(ethylene terephthalate) (PET)/montmorillonite (MMT) nanocomposite was prepared by the direct polymerization with MMTs modified with variable content of antimony acetate (Sb(OAc)3), which was also used as catalyst polymerization. The modified MMTs (AS-Sb-MMT) were prepared by intercalating both Sb(OAc)3 and amphoteric surfactant (AS) into MMT layers. A model is developed to describe the swelling of Na-MMT and modified MMT by EG and the effect of drying temperature on the interlayer spacing. Exfoliation state of MMT in PET matrix of nanocomposites is controlled not only by Sb content and interlayer spacing, but also by the composition of Sb catalyst in modified MMT.

    34. Solid-Liquid Equilibria in the Quinary Na+, K+//Cl, SO2−4, B4O2−7-H2O System at 298 K (pages 1285–1289)

      Shihua Sang, Xiao Zhang, Xiaoxiao Zeng and Dan Li

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190238

      Thumbnail image of graphical abstract

      In the equilibrium diagram of the quinary system Na+, K+//Cl, SO2−4, B4O2−7-H2O at 298 K, there are five invariant points F1, F2, F3, F4 and F5, eleven univariant curves E1F1, E2F2, E3F3, E4F5, E5F2, E6F4, E7F5, F1F4, F2F4 F1F3 and F3F5, and seven fields of crystallization saturated with Na2B4O7 corresponding to Na2SO4, Na2SO4·10H2O (S10), Na2SO4· 3K2SO4 (Gla), K2SO4, K2B4O7·4H2O, NaCl and KCl.

  3. Note

    1. Top of page
    2. Contents
    3. Full Papers
    4. Note
    1. A New and Efficient Procedure for Synthesis of 1,5-Benzodiazepine Derivatives in Solution and under Solvent-Free Conditions (pages 1290–1293)

      Khodayar Gholivand, Karim Zare, Hadi Jafari and Hadi Adibi

      Version of Record online: 27 JUN 2011 | DOI: 10.1002/cjoc.201190239

      Thumbnail image of graphical abstract

      Borax/phosphorous oxychloride (BPO) efficiently catalyzes the preparation of 1,5-benzodiazepine derivatives of o-phenylenediamines and ketones in solvent-free and solution conditions. The reaction proceeds efficiently under ambient conditions giving excellent yields of the products. This new protocol allows the recycling of catalyst with no loss in its potency.