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4-(methylthio)-1H-imidazole; CAS No.: 83553-60-0; 4-(methylthio)-1H-imidazole. PROPERTIES: This compound features a 4-(methylthio)-1H-imidazole structure, combining a methylthio group and an imidazole ring system. It typically appears as a white to off-white crystalline solid with a molecular weight of approximately 111.1 g/mol (C5H7N2S). The melting point ranges between 80-85 C, and it exhibits moderate solubility in common organic solvents like ethanol, methanol, and DMSO while being sparingly soluble in water. Proper storage requires a tightly sealed container in a cool, dry place. Safety precautions include wearing appropriate PPE. It is classified as a skin and eye irritant (GHS07) with the hazard statement H315-H319. APPLICATIONS: 4-(Methylthio)-1H-imidazole is utilized in pharmaceutical research as a building block for developing bioactive molecules. Its 4-(methylthio)-1H-imidazole structure enables participation in various reactions, including nucleophilic substitution at the imidazole ring and oxidation of the methylthio group to sulfone. In medicinal chemistry, it is used to create enzyme inhibitors and receptor modulators, particularly those targeting histidine-containing sites. The methylthio group can be oxidized to sulfone to enhance water solubility or undergo displacement reactions to introduce various substituents. This compound also functions as a starting material in the synthesis of agrochemicals (though agricultural applications are excluded here). Academic studies employ it as a model system in Medicinal Chemistry journals, focusing on the development of novel imidazole derivatives with improved biological activity based on the 4-(methylthio)-1H-imidazole scaffold.