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    • 9. 发明申请
    • method for preparing 2-(N-substituted)-amino-benzimidazole derivatives
    • 制备2-(N-取代) - 氨基 - 苯并咪唑衍生物的方法
    • US20130345436A1
    • 2013-12-26
    • US13976865
    • 2011-01-26
    • Yueheng JiangTong CaiLimin QueZhigang Lin
    • Yueheng JiangTong CaiLimin QueZhigang Lin
    • C07D235/30
    • C07D235/30C07C273/1836C07C303/40C07D235/14Y02P20/55C07C311/21C07C275/40
    • A method for preparing 2-(N-substituted)-amino-benzimidazole derivatives is provided, which comprises the following steps: (1) reacting a compound of 2-(N-protecting group)-O-aryl diamine with a compound of N-phenoxycarbonyl monosubstituted amine to obtain a compound of 2-(N-protecting group)-amino aryl urea; (2) in a suitable organic solvent, performing dehydrating cyclization reaction of the compound of 2-(N-protecting group)-amino aryl urea in the presence of an organic base and dichloro triphenylphosphine prepared by triphenylphosphine oxide with oxalyl chloride or diphosgene or triphosgene, or dibromo triphenylphosphine prepared by triphenylphosphine oxide with bromine, to produce a compound of 1-protecting group-2-(N-substituted)-amino-benzimidazole; (3) deprotecting the resulting compound of 1-protecting group-2-(N-substituted)-amino-benzimidazole to obtain the compound 2-(N-substituted)-amino-benzimidazole.
    • 提供了制备2-(N-取代的) - 氨基 - 苯并咪唑衍生物的方法,其包括以下步骤:(1)使2-(N-保护基)-O-芳基二胺的化合物与N - 苯氧基羰基单取代胺,得到2-(N-保护基) - 氨基芳基脲的化合物; (2)在合适的有机溶剂中,在有机碱和通过三苯基氧化膦与草酰氯或双光气或三光气制备的二氯三苯基膦存在下进行2-(N-保护基) - 氨基芳基脲的化合物的脱水环化反应 或由三苯基膦氧化物与溴制备的二溴三苯基膦,得到1-保护基-2-(N-取代的) - 氨基 - 苯并咪唑的化合物; (3)将所得的1-保护基-2-(N-取代的) - 氨基 - 苯并咪唑化合物脱保护,得到化合物2-(N-取代的) - 氨基 - 苯并咪唑。