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5.188 Aktuelle Fachpublikationen zum Thema temperature

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Custom designed nanocrystalline Li2MSiO4/reduced graphene oxide (M=Fe, Mn) formulations as high capacity cathodes for rechargeable lithium batteries

29.10.2014 | D Bhuvaneswari; Kalaiselvi Nallathamby, Dalton Transactions, 2014

Abstract: Nanocrystalline Li2MSiO4 (M=Fe, Mn) particles embedded between in-situ formed rGO sheets are obtained by adopting customised solvothermal synthesis. An appreciable room temperature specific capacity of 149 mAh g-1 with 89% capacity retention and 210 mAh g-1 with 87% retention have been ...

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Zinc Chloride Catalyzed Collective Synthesis of Arylmethylene Bis(3- hydroxy-2-cyclohexene-1-ones) and 1,8-Dioxo-octahydroxanthene/acridine Derivatives

28.10.2014 | Selva Ganesan, Subramaniapillai; Kothandapani, Jagatheeswaran; Ganesan, Asaithampi, Letters in Organic Chemistry, 2014

Abstract: Catalytic amount of ZnCl2 efficiently promoted rapid synthesis of arylmethylene bis(3-hydroxy-2-cyclohexene- 1-one) in water at room temperature in excellent yield. At elevated temperature, ZnCl2 also catalyzed one-pot synthesis of 1,8-dioxo-octahydroxanthene and ...

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Ultrasound-promoted One-pot Synthesis of 2-Thioxo-dihydropyrimidine Derivatives Bearing Piperidinylamide Moiety

28.10.2014 | Chen, Bao-Hua; Li, Ji-Tai; Lan, Rui-Jia; Chen, Guo-Feng, Letters in Organic Chemistry, 2014

Abstract: A convenient and efficient one-pot synthesis of 2-thioxo-dihydropyrimidine derivatives bearing piperidinylamide moiety is described. The reactions were carried out in 81-91% yields via the condensation of 1-(piperidin-1- yl)butane-1,3-dione with aromatic aldehyde and thiourea in ...

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Glycerol Mediated Strecker Reaction: Catalyst-free Protocol for the Synthesis of α-Amino Nitriles

28.10.2014 | S. Ghogare, Ramesh; Rajeshwari, K.; Venkat Narsaiah, A., Letters in Organic Chemistry, 2014

Abstract: Environmental friendly multicomponent protocol for the preparation of α-amino nitriles has been developed. In this methodology, glycerol was demonstrated as an efficient and alternative solvent for organic synthesis. After the reaction, glycerol was recovered and reused for ...

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Preparation of Pyrido[2,3-b]pyrazine Ring System via Regioselective Condensation Reaction

28.10.2014 | Kekesi, Laszlo; Dancso, Andras; Illyes, Eszter; Boros, Sandor; Pato, Janos; Greff, Zoltan; Nemeth, Gabor; Garamvolgy ..., Letters in Organic Chemistry, 2014

Abstract: The pyrido[2,3-b]pyrazine core structure can be found in several molecules that express biological activity. We have previously published a series of these compounds that showed erlotinib-resistant tumor inhibitor potential. The common way of their synthesis is the condensation of ...

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Nanocryatalline Pt-CeO2 as an efficient catalyst for room temperature selective reduction of nitroarenes

28.10.2014 | Rajaram Bal; Astha Shukla; Rajib K Singha; Takehiko Sasaki, Green Chemistry, 2014

We have developed a new synthesis strategy to prepare Pt nanoparticles with size between 2-5 nm supported on CeO2 nanoparticle with size between 30-60 nm by hydrothermal method in presence of surfactant cetyltrimethyl ammonium bromide( CTAB) and polymer (PVP). It was found that the catalyst is ...

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Non-aqueous microgel particles: synthesis, properties and applications

28.10.2014 | J. A. Bonham; M. A. Faers; J. S. van Duijneveldt, Soft Matter, 2014

Microgels are cross-linked polymer latex particles that can form stable colloidal dispersions. Their typical sizes range from 10 to 1000 nm and they can swell in response to their external environment (pH, temperature and solvency). This swelling behaviour is central to many potential ...

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Asymmetric Michael Addition of 5 H‐Oxazol‐4‐ones to Vinyl Sulfones: Stereoselective Synthesis of Monofluorinated Analogs of 2‐Tertiary Hydroxyl‐3‐Methyl‐Substituted Carboxylic Acidl Derivatives

24.10.2014 | Qian Liu, Baokun Qiao, Kek Foo Chin, Choon‐Hong Tan, Zhiyong Jiang, Advanced Synthesis & Catalysis, 2014

Abstract An asymmetric Michael addition of 5H‐oxazol‐4‐ones to vinyl sulfones has been developed. In the presence of 10 mol % of quinine‐based benzyl‐substituted thiourea as catalyst at 0 °C, the products could be obtained with excellent enantio‐ and diastereoselectivity (up to>99 % ee ...

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Initiated CVD of Tertiary Amine‐Containing Glycidyl Methacrylate Copolymer Thin Films for Low Temperature Aqueous Chemical Functionalization

24.10.2014 | Fatma Sarıipek, Mustafa Karaman, Chemical Vapor Deposition, 2014

Abstract This manuscript reports on the synthesis of copolymer films of glycidyl methacrylate with diethylaminoethyl methacrylate by initiated (i)CVD. The purpose of the incorporation of tertiary amine functionality in the copolymer film is to accelerate the rate of the nucleophilic ...

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Practical and Highly Selective CH Functionalization of Structurally Diverse Ethers

24.10.2014 | Miao Wan, Zhilin Meng, Hongxiang Lou, Lei Liu, Angewandte Chemie International Edition, 2014

Abstract A trityl ion mediated CH functionalization of ethers with a wide range of nucleophiles at ambient temperature has been developed. The reaction displays high chemoselectivity and good functional group tolerance. The protocol also exhibits excellent regio‐ and diastereoselectivities ...

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