以苯甲醛和1,3-环己二酮为原料,以乙醇为溶剂,采用常规合成方法、无溶剂研磨法和微波法3种方法合成氧杂蒽二酮,最高收率分别为69％、50％和75％.对3种方法进行对比分析发现,微波法产率高,操作简便.微波法中苯甲醛和环己二酮的摩尔比为1:2,微波功率为230 W,反应时间为15 min.

To direct at the current situation related to professional organic chemistry experiment course,the problems in organic chemistry experiment teaching reform were explored and investigated,with the teaching contents and teaching methods as the breakthrough point, strengthening the basic operation, embodying the professional characteristics, implementing micro experiment,attaching importance to experimental process,running through the concept of green chemistry,diversifying assessment model,with practical ability,innovation,quality as personnel training objectives.

Solvent-free synthesis of chalcone under grinding condition at room temperature,with benzaldehyde and hypnone as materials,was investigated.The choose of basic catalyst,the amount of catalyst,the ratio of reactants was discussed in detail.The optimized conditions were as follows:grinding at room temperature for 20 min,the mole ratio 6∶ 4∶2 of benzaldehyde to hypnone,with NaOH / Na 2 CO 3 as catalyst and 75% ethanol as recrystalization solvent to obtain the yield 80.6% of chalcone.

A novel and clean synthesis of 5-benzylidene-2-thioxothiazolidin-4-ones and thiazolidine-2,4-diones has been achieved in good yields by condensation of aromatic aldehydes with rhodanine or thiazolidine-2,4-dione under microwave irradiation using glycine as the catalyst.

ChemInformVolume 43, Issue 3 Isocyclic Compounds ChemInform Abstract: Synthesis of Racemic Mandelic Acids with the Composite Phase Transfer Catalyst β-Cyclodextrin-[bmim]PF6. Ben-Yong Yang, Ben-Yong Yang Dep. Energ. Environ., Zhongyuan Univ. Technol., Zhengzhou, Henan 450007, Peop. Rep. ChinaSearch for more papers by this authorDe-Hong Yang, De-Hong Yang Dep. Energ. Environ., Zhongyuan Univ. Technol., Zhengzhou, Henan 450007, Peop. Rep. ChinaSearch for more papers by this author Ben-Yong Yang, Ben-Yong Yang Dep. Energ. Environ., Zhongyuan Univ. Technol., Zhengzhou, Henan 450007, Peop. Rep. ChinaSearch for more papers by this authorDe-Hong Yang, De-Hong Yang Dep. Energ. Environ., Zhongyuan Univ. Technol., Zhengzhou, Henan 450007, Peop. Rep. ChinaSearch for more papers by this author First published: 22 December 2011 https://doi.org/10.1002/chin.201203060Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume43, Issue3January 17, 2012 RelatedInformation

Ionic liquids were employed as a part of composite phase transfer catalyst to synthesise mandelic acid, and it is found that [bmim]PF6 coupled with β-cyclodextrin is the most effective catalyst, which was also applicable to other reactions used to synthesise mandelic acid derivatives. Reaction conditions were optimized and the products were characterised by 1H NMR and IR.

2,4-Thiazolidinedione was synthesized by one step method under microwave irradiation with thiourea and chloroactic acid giving the yield of 58%,which operated conveniently with appropriate yield,and was feasible to popularize.

绿色化学是当前化学化工领域的关注热点,本文结合教学实践,就如何在分析化学教学中渗透绿色化学教育理念进行了探讨,取得了较好的效果。

At the basis of hydrotalcite like compounds,activated carbon was introduced as support to disperse active component of CoCuAl hydrotalcite-like catalyst,which resulted in improvements of anti-inactivation and increasing of recycling times of the catalyst.And the reaction conditions were also optimized with the characteristic of mass transfer control of the reaction.

An efficient method for the synthesis of N-aryl-5-arylidene-2,4-thiazolidinediones has been developed involving the N-arylation of 5-arylidene-2,4-thiazolidinediones derivatives with diaryliodonium salts in the ionic liquid [bmim]PF6 (1-butyl-3-methylimidazolium hexafluorophosphate).

Common materials in coal mine are in the harsh environment of gas. For the sake of safety, a better antistatic and fire protection material properties is demanded. A certain amount of antistatic materials and fire protection material has to be filled in order to improve the antistatic properties especially the fireproof functions. And using the normal filling method will inevitablely reduce the mechanical performance. This paper discusses the influence of the crosslinking agent on nano-filler particle size and the structure of the polymer, the influence of the filler particle size and the ratio of different components on the conductivity of composite materials and the tensile strength, impact strength and ductility of materials. The influence of mastication temperature and time on the PTC effect is studied. The mechanism of the volume effect and surface effect and improving the tribology and mechanical properties is also studied.

By analyzing the macro electrical properties and the microscopic structure from SEM of nanomaterials modified mine transmission belt samples. The influences of the filling process of inorganic nano particle-filled rubber and PVC polymer on the physical properties of coal transmission belt is reviewed, as well as PTC and NTC effect on the stability of the physical properties and stability of materials. Influence of nano-materials and polymer materials for rubber and temperature changes in the plastic filled refining process. Crosslinker and major filler changes in the amount and filled plastic chain time on the conductivity of coal conveyer belt is studied. Influence of cure temperature. Cure time on the mechanical performance is studied. The microscopic mechanism of macro conductivity change of conveyer belt is discussed.

结合我校分析化学设计性实验的教学实践,探讨了在设计性实验的各个环节中应注意的问题,即要重视基础性实验,补充贴近生活的实验,鼓励学生大胆尝试。

The surface processing craft of the nano filler is studied.The influence of the dosage of crosslinking agent upon the degree of nano particles and the influence of the degree of nano particles on the structure of high polymers and the electrical conduct properties of the composite material are inquiried in.How the mastication time and mastication temperature of the mixture of various rubbers and plastics affect the PTC effect and how to improve the stability of the PTC effect are studied.How to raise the electrical conduct properties and mechanical properties of material completely is also introduced.

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

(Z)-5-Benzylidenethiazolidine-2,4-dione is synthesized by Knoevenagel condensation reaction of benzaldehyde with 2,4-thiazolidione on solid base KF-Al2O3. under mild condition with good yields.

In the coal mine environment where there is gas,the workers are equivalent to a moving static conductor.The static electricity on human body is more concealed,more accidental and more dangerous than the static electricity on device.This paper makes certain the human body electric capacity and human body electric resistance in the coal mine special environment by experiments,and builds up the ESD model of human body in the coal mine environment.This provides an experimental basis for establishing the standard of the human body static safety in coal mine.

2-(methyl-2-pyridinylamino)ethanol is the key intermediate to synthesis of rosiglitazone.To enhance the reaction yield,appropriately increasing reaction temperature and changing post-disposal can shorten reaction time to 7~8h,simplify the operations and significantly improve the yield to 95%.

全面综述了喷墨打印技术在电子制造业、陶瓷制品、生物工程和生物分析、高分子薄膜以及薄膜电极等领域的崭新应用。作为一种低成本、简单易行的制造方法,喷墨打印技术具有非常广泛的开发应用前景。

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.