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2,5-二溴噻唑 |
CAS No.: |
4175-78-4 |
分子式: |
C3HBr2NS |
分子量: |
242.92 |
备注: |
中文名称2,5-二溴噻唑中文同义词2,5-二溴噻唑;2,5-二溴噻唑,97%;2,5-二溴-1,3-噻唑;2,5-二溴噻唑10G;2,5-二溴噻唑(CAS号:4175-78-4)英文名称2,5-DIBROMOTHIAZOLE英文同义词2,5-Dibromo-1,3-thiazole;2,5-DIBROMOTHIAZOLE;2,5-DIBROMOTHIAZOLE95%;2,5-Dibromothiazole,97%;Thiazole,2,5-dibroMo-;NSC222407;2,5-Dibormothiazole;DibromoThiazoleCAS号4175-78-4分子式C3HBr2NS分子量242.92EINECS号628-983-7相关类别噻唑类;医药中间体;药物中间体;杂环;噻唑;合成;BuildingBlocks;C3toC7;ChemicalSynthesis;HalogenatedHeterocycles;HeterocyclicBuildingBlocks;alkylbromide;BuildingBlocks;SulphurDerivatives;HeterocyclicCompounds;Thiazoles;HalogenatedHeterocycles;HeterocyclicBuildingBlocks;ThiazolesHeterocyclicBuildingBlocksMol文件4175-78-Chemicalbook4.mol结构式2,5-二溴噻唑性质熔点45-49°C(lit.)沸点242.8±13.0°C(Predicted)密度2.324±0.06g/cm3(Predicted)闪点110°C储存条件Inertatmosphere,Storeinfreezer,under-20°C溶解度溶于甲醇酸度系数(pKa)-0.88±0.10(Predicted)形态结晶粉末颜色白色至棕色InChIKeyXIBIQFJKUZZLLX-UHFFFAOYSA-NCAS数据库4175-78-4(CASDataBaseReference)2,5-二溴噻唑用途与合成方法应用2,5-二溴噻唑因环上有卤素可发生多种化学反应,为噻唑环衍生物制备的常见中间体。制备向一个干燥的250mL圆底三口烧瓶内加入1.86g(0.01mol)2,5-二氨基噻唑,7.12g(0.03mol)五水硫酸铜,3.97g(0.04mol)溴化钠和9mol/L硫酸溶液20mL,冰盐浴冷却至-5~-10℃,之后缓慢向其中滴加已经冷却至室温的亚硝酸钠溶液(0.79g亚硝酸钠溶解于6.76mL水中)。滴加过程持续约40min。滴加完毕后将反应液温度缓慢升至室温,并继续搅拌30min,加20mL水稀释反应液,用乙酸乙酯萃取(3×20mL),合并有机相。用无水硫酸镁过夜干燥。将干燥好的液体抽滤,滤去硫酸镁等杂质,减压蒸除溶剂。用无水乙醇进行重结晶操作,低温烘干得1.72g产物2,5-二溴噻唑。 |
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