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    Home > Chemicals Industry > Chemical Technology > Cinnamic acid

    Cinnamic acid

    • Last Update: 2022-06-05
    • Source: Internet
    • Author: User
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    Cinnamic acid

    Cinnamic acid

    [Synonyms] cinnamic acid, trans-Cirnamic acid

    【Structural formula】

    [Molecular formula and molecular weight] C 9 H 8 O 2 ; 148.
    16

    [Source] The dry bark of Lauraceae Cinnamomum cassia Presl
    .

    【Properties】White powder
    .

    This product is soluble in methanol
    .

    Melting point: 132~133℃
    .

    【Purity Check】

    TLC

    1.
    Thin layer plate silica gel G

    Developing solvent hexane - ether - acetic acid (5: 5: 0.
    1)

    Check under UV lamp (254nm)

    2.
    Thin layer plate silica gel G

    Eluent petroleum ether - cyclohexane - ethyl - carboxylic acid (10:30:15:1)

    Check under UV lamp (254nm)

    High performance liquid chromatography

    Chromatographic column AgilentC 18 , 5um (4.
    6mm×250mm)

    The mobile phase methanol -0.
    1%
    acetic acid (50:50), 1.
    0ml / min

    Detection wavelength 285nm

    【Structural identification】273,216,205
    .

    2596, 1684, 1631, 1450, 1344, 1288, 1227, 933, 766
    .

    EI-MS m/z: 148[M] + , 131, 103, 91, 77, 51
    .

    1 H-NMR (CD 3 OD) δ: 6.
    50 (1H, d, J=16Hz, H-8), 7.
    39~7.
    42 (3H, m, H-2,4,6), 7.
    57~7.
    60 (2H, m , H-3, 5), 7.
    70 (1H, d, J=16Hz, H-7)

    .

    13 C-NMR (CD 3 OD) δ: 170.
    3 (C-9), 119.
    3 (C-8), 146.
    3 (C-7), 135.
    8 (C-1), 129.
    1 (C-2, 6), 129.
    9 ( C-3, 5), 131.
    3(C-4)

    .

    【Storage】Dry and airtight
    .

    Related Links: Swertia Picrinoside

     

     

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