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Alkylamines

The Experts below are selected from a list of 303 Experts worldwide ranked by ideXlab platform

Junichi Yoshida – 1st expert on this subject based on the ideXlab platform

  • heterocyclization approach for electrooxidative coupling of functional primary Alkylamines with aromatics
    ChemInform, 2015
    Co-Authors: Tatsuya Morofuji, Akihiro Shimizu, Junichi Yoshida

    Abstract:

    An effective method for C—H amination of aromatic compounds with functionalized primary Alkylamines via heterocyclization based on the rational reaction design is reported.

  • heterocyclization approach for electrooxidative coupling of functional primary Alkylamines with aromatics
    Journal of the American Chemical Society, 2015
    Co-Authors: Tatsuya Morofuji, Akihiro Shimizu, Junichi Yoshida

    Abstract:

    A new approach for electrooxidative coupling of aromatic compounds and primary Alkylamines bearing a functional group such as a hydroxyl group and an amino group was developed. The key to the success of the transformation is heterocyclization of functional primary Alkylamines. Treatment of primary Alkylamines bearing a functional group with nitriles or their equivalents gives the corresponding heterocycles. The electrochemical oxidation of aromatic substrates in the presence of the heterocycles followed by chemical reaction under nonoxidative conditions gave the desired coupling products.

Rujin Huang – 2nd expert on this subject based on the ideXlab platform

  • determination of Alkylamines in atmospheric aerosol particles a comparison of gas chromatography mass spectrometry and ion chromatography approaches
    Atmospheric Measurement Techniques, 2014
    Co-Authors: Rujin Huang, W B Li, Y R Wang, Qiyuan Wang, Kinfai Ho, Gehui Wang, X Chen

    Abstract:

    Abstract. In recent years low molecular weight Alkylamines have been recognized to play an important role in particle formation and growth in the lower atmosphere. However, major uncertainties are associated with their atmospheric processes, sources and sinks, mostly due to the lack of ambient measurements and the difficulties in accurate quantification of Alkylamines at trace level. In this study, we present the evaluation and optimization of two analytical approaches, i.e., gas chromatography–mass spectrometry (GC-MS) and ion chromatography (IC), for the determination of Alkylamines in aerosol particles. Alkylamines were converted to carbamates through derivatization with isobutyl chloroformate for GC-MS determination. A set of parameters affecting the analytical performances of the GC-MS approach, including reagent amount, reaction time and pH value, was evaluated and optimized. The accuracy is 84.3–99.1%, and the limits of detection obtained are 1.8–3.9 pg (or 0.02–0.04 ng m−3). For the IC approach, a solid-phase extraction (SPE) column was used to separate Alkylamines from interfering cations before IC analysis. 1–2% (v/v) of acetone (or 2–4% (v/v) of acetonitrile) was added to the eluent to improve the separation of Alkylamines on the IC column. The limits of detection obtained are 2.1–15.9 ng (or 0.9–6.4 ng m−3), and the accuracy is 55.1-103.4%. The lower accuracy can be attributed to evaporation losses of amines during the sample concentration procedure. Measurements of ambient aerosol particle samples collected in Hong Kong show that the GC-MS approach is superior to the IC approach for the quantification of primary and secondary Alkylamines due to its lower detection limits and higher accuracy.

Tatsuya Morofuji – 3rd expert on this subject based on the ideXlab platform

  • heterocyclization approach for electrooxidative coupling of functional primary Alkylamines with aromatics
    ChemInform, 2015
    Co-Authors: Tatsuya Morofuji, Akihiro Shimizu, Junichi Yoshida

    Abstract:

    An effective method for C—H amination of aromatic compounds with functionalized primary Alkylamines via heterocyclization based on the rational reaction design is reported.

  • heterocyclization approach for electrooxidative coupling of functional primary Alkylamines with aromatics
    Journal of the American Chemical Society, 2015
    Co-Authors: Tatsuya Morofuji, Akihiro Shimizu, Junichi Yoshida

    Abstract:

    A new approach for electrooxidative coupling of aromatic compounds and primary Alkylamines bearing a functional group such as a hydroxyl group and an amino group was developed. The key to the success of the transformation is heterocyclization of functional primary Alkylamines. Treatment of primary Alkylamines bearing a functional group with nitriles or their equivalents gives the corresponding heterocycles. The electrochemical oxidation of aromatic substrates in the presence of the heterocycles followed by chemical reaction under nonoxidative conditions gave the desired coupling products.