Home  About us  Contact
 

Scale Synthesis (scale + synthesis)

Distribution by Scientific Domains
Chemistry75%

Kinds of Scale Synthesis

  • large scale synthesis
    		•

    Selected Abstracts

    Triphase Hydrogenation Reactions Utilizing Palladium-Immobilized Capillary Column Reactors and a Demonstration of Suitability for Large Scale Synthesis

    ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 15 2005
    Juta Kobayashi
    Abstract We have developed a practical and highly productive system for hydrogenation reactions utilizing capillary column reactors, which occupy less space than ordinary batch systems, are low cost and easy to handle, and show feasibility toward large-scale chemical synthesis. Palladium-containing micelles were immobilized onto the inner surface of the capillaries. Nine palladium-immobilized capillaries were assembled and connected to a T-shaped connector, and hydrogen and a substrate solution were fed to capillaries via the connector. Hydrogenation of 1-phenyl-1-cyclohexene (1) proceeded smoothly to give phenylcyclohexane in quantitative yield. The capillaries themselves occupy only ca. 0.4,mL and a high space-time yield has been achieved (124.3,mg/17,min/0.4,mL). In addition, leaching of palladium was not detected by ICP analysis after reactions. [source]

    An Efficient Large Scale Synthesis of Nateglinide.

    CHEMINFORM, Issue 9 2005
    Batchu Chandrasekhar
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]

    A Practical Oxone®-Mediated, High-Throughput, Solution-Phase Synthesis of Benzimidazoles from 1,2-Phenylenediamines and Aldehydes and Its Application to Preparative Scale Synthesis.

    CHEMINFORM, Issue 50 2003
    Pierre L. Beaulieu
    Abstract For Abstract see ChemInform Abstract in Full Text. [source]

    ChemInform Abstract: Large Scale Synthesis of Carbon Nanofibers by Catalytic Decomposition of Ethane on Nickel Nanoclusters Decorating Carbon Nanotubes.

    CHEMINFORM, Issue 16 2002
    Cuong Pham-Huu
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    Easy preparative scale syntheses of labelled xanthines: caffeine, theophylline and theobromine

    JOURNAL OF LABELLED COMPOUNDS AND RADIOPHARMACEUTICALS, Issue 1 2007
    Frédéric Balssa
    Abstract Several easy preparative scale (0.5,1.5 g) syntheses of deuterium labelled caffeine, theophylline and theobromine are described. Some new selective syntheses of theophylline and theobromine have been developed. Labelled xanthines are of great interest in qualitative or quantitative isotope dilution-mass spectrometry, coupled with gas or liquid chromatography, currently performed in anti-doping and forensic laboratories. Copyright © 2007 John Wiley & Sons, Ltd. [source]

    Synthesis and Structure,Property Correlation in Shape-Controlled ZnO Nanoparticles Prepared by Chemical Vapor Synthesis and their Application in Dye-Sensitized Solar Cells

    ADVANCED FUNCTIONAL MATERIALS, Issue 6 2009
    Revathi R. Bacsa
    Abstract Here, the large scale synthesis of nanocrystalline ZnO spheres and tetrapods in the size range of 8,40,nm by chemical vapor synthesis using zinc metal as precursor is described. A detailed study of the effect of experimental parameters on the morphology and yield is presented. High-resolution transmission electron microscopy images of the tetrapods show that they are formed by the self assembly of four nanorods in the vapor phase. The tetrapods have optical absorption coefficients that are one order of magnitude greater than the spheres and show intense UV luminescence whereas the spheres show only the green emission. The observed differences in the optical properties are related to the presence of surface defects present in the nanospheres. The tetrapods have increased efficiencies for application in dye sensitized solar cells when compared to spheres. [source]

    Filling of carbon nanotubes for bio-applications

    PHYSICA STATUS SOLIDI (B) BASIC SOLID STATE PHYSICS, Issue 11 2007
    S. Costa
    Abstract Carbon nanotubes (CNT) provide a smart carrier system on the nanometer scale. The system can be used as a template for ferromagnetic fillers. Such a molecular hybrid is a promising potential candidate for the controlled heating of tumour tissue at the cellular level. This is a key reason why it is important to optimize the synthesis route of metal filled carbon nanotubes with regards bulk scale synthesis and purity. In the current study we present multiwalled carbon nanotubes filled with ,-iron phase (Fe-MWCNT). The influence of acid treatment on the stability of the filling and the sample purity is also presented. High resolution transmission microscopy, its Energy dispersive X-Ray spectroscopy (EDX) and electron energy-loss spectroscopy (EELS) modes have been applied for the analysis of the morphology and chemical composition of the samples. The phase of iron nanowires encapsulated into the carbon nanotubes was determined with selected area electron diffraction (SAED) on a local scale. (© 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) [source]

    Combining Enabling Techniques in Organic Synthesis: Continuous Flow Processes with Heterogenized Catalysts

    CHEMISTRY - A EUROPEAN JOURNAL, Issue 23 2006
    Andreas Kirschning Prof. Dr.
    Abstract The concepts article describes enabling techniques (solid-phase assisted synthesis, new reactor design, microwave irradiation and new solvents) in organic chemistry and emphasizes the combination of several of them for creating new synthetic technology platforms. Particular focus is put on the combination of immobilized catalysts as well as biocatalysts with continuous flow processes. In this context, the PASSflow continuous flow technique fulfils both chemical as well as chemical engineering requirements. It combines reactor design with optimized, monolithic solid phases as well as reversible immobilization techniques for performing small as well as large scale synthesis with heterogenized catalysts under continuous flow conditions. [source]