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4-Hydroxypyridine

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Mark M. Turnbull – One of the best experts on this subject based on the ideXlab platform.

Jeffrey C. Monroe – One of the best experts on this subject based on the ideXlab platform.

Hans-ulrich Reissig – One of the best experts on this subject based on the ideXlab platform.

Ludwik Syper – One of the best experts on this subject based on the ideXlab platform.

  • Catalytic Method for N-Methyl-4-pyridone Synthesis in the Presence of ZnAl_2O_4
    Catalysis Letters, 2008
    Co-Authors: Hanna Grabowska, Mirosław Zawadzki, Ludwik Syper
    Abstract:

    A composite oxide ZnAl_2O_4 was prepared by microwave-assisted hydrothermal treatment, a precursor mixture of hydroxides obtained by precipitation of aluminium and zinc nitrates. Characterization by TEM, XRD and textural studies shows that ZnAl_2O_4 is nanosized and is a micro/mesoporous material with large a surface area (140 m^2/g). The gas phase catalytic methylation of 4-Hydroxypyridine in the presence of the ZnAl_2O_4 catalyst was performed in a continuous process at atmospheric pressure in the temperature range of 240–360 °C. A mixture of O – and N -alkylated products, namely 4-methoxypyridine and N -methyl-4-pyridone were obtained. The alkylation of 4-Hydroxypyridine with methanol at 345 °C offered 87.6% selectivity towards N -methyl-4-pyridone with about 89% 4-Hydroxypyridine conversion.

  • Catalytic Method for N-Methyl-4-pyridone Synthesis in the Presence of ZnAl2O4
    Catalysis Letters, 2007
    Co-Authors: Hanna Grabowska, Mirosław Zawadzki, Ludwik Syper
    Abstract:

    A composite oxide ZnAl2O4 was prepared by microwave-assisted hydrothermal treatment, a precursor mixture of hydroxides obtained by precipitation of aluminium and zinc nitrates. Characterization by TEM, XRD and textural studies shows that ZnAl2O4 is nanosized and is a micro/mesoporous material with large a surface area (140 m2/g). The gas phase catalytic methylation of 4-Hydroxypyridine in the presence of the ZnAl2O4 catalyst was performed in a continuous process at atmospheric pressure in the temperature range of 240–360 °C. A mixture of O- and N-alkylated products, namely 4-methoxypyridine and N-methyl-4-pyridone were obtained. The alkylation of 4-Hydroxypyridine with methanol at 345 °C offered 87.6% selectivity towards N-methyl-4-pyridone with about 89% 4-Hydroxypyridine conversion.

  • gas phase alkylation of 2 hydroxypyridine with methanol over hydrothermally synthesised zinc aluminate
    Applied Catalysis A-general, 2006
    Co-Authors: Hanna Grabowska, Miroslaw Zawadzki, Ludwik Syper
    Abstract:

    Abstract The gas phase alkylation of 2-hydroxypyridine with methanol at atmospheric pressure, over ZnAl 2 O 4 , prepared via hydrothermal route, is reported. The catalyst was characterised by XRD, HRTEM, DTA-TG, BET surface area measurements, pore-size analysis and surface acidity. The catalyst indicates high selectivity (over 95%) in the reaction of methanol with 2-hydroxypyridine leading to N -methyl-2-pyridone and its activity does not change substantially in the temperature range of 325–340 °C.

Hanna Grabowska – One of the best experts on this subject based on the ideXlab platform.

  • Catalytic Method for N-Methyl-4-pyridone Synthesis in the Presence of ZnAl_2O_4
    Catalysis Letters, 2008
    Co-Authors: Hanna Grabowska, Mirosław Zawadzki, Ludwik Syper
    Abstract:

    A composite oxide ZnAl_2O_4 was prepared by microwave-assisted hydrothermal treatment, a precursor mixture of hydroxides obtained by precipitation of aluminium and zinc nitrates. Characterization by TEM, XRD and textural studies shows that ZnAl_2O_4 is nanosized and is a micro/mesoporous material with large a surface area (140 m^2/g). The gas phase catalytic methylation of 4-Hydroxypyridine in the presence of the ZnAl_2O_4 catalyst was performed in a continuous process at atmospheric pressure in the temperature range of 240–360 °C. A mixture of O – and N -alkylated products, namely 4-methoxypyridine and N -methyl-4-pyridone were obtained. The alkylation of 4-Hydroxypyridine with methanol at 345 °C offered 87.6% selectivity towards N -methyl-4-pyridone with about 89% 4-Hydroxypyridine conversion.

  • Catalytic Method for N-Methyl-4-pyridone Synthesis in the Presence of ZnAl2O4
    Catalysis Letters, 2007
    Co-Authors: Hanna Grabowska, Mirosław Zawadzki, Ludwik Syper
    Abstract:

    A composite oxide ZnAl2O4 was prepared by microwave-assisted hydrothermal treatment, a precursor mixture of hydroxides obtained by precipitation of aluminium and zinc nitrates. Characterization by TEM, XRD and textural studies shows that ZnAl2O4 is nanosized and is a micro/mesoporous material with large a surface area (140 m2/g). The gas phase catalytic methylation of 4-Hydroxypyridine in the presence of the ZnAl2O4 catalyst was performed in a continuous process at atmospheric pressure in the temperature range of 240–360 °C. A mixture of O- and N-alkylated products, namely 4-methoxypyridine and N-methyl-4-pyridone were obtained. The alkylation of 4-Hydroxypyridine with methanol at 345 °C offered 87.6% selectivity towards N-methyl-4-pyridone with about 89% 4-Hydroxypyridine conversion.

  • gas phase alkylation of 2 hydroxypyridine with methanol over hydrothermally synthesised zinc aluminate
    Applied Catalysis A-general, 2006
    Co-Authors: Hanna Grabowska, Miroslaw Zawadzki, Ludwik Syper
    Abstract:

    Abstract The gas phase alkylation of 2-hydroxypyridine with methanol at atmospheric pressure, over ZnAl 2 O 4 , prepared via hydrothermal route, is reported. The catalyst was characterised by XRD, HRTEM, DTA-TG, BET surface area measurements, pore-size analysis and surface acidity. The catalyst indicates high selectivity (over 95%) in the reaction of methanol with 2-hydroxypyridine leading to N -methyl-2-pyridone and its activity does not change substantially in the temperature range of 325–340 °C.