申请人:TIANJIN WEIJIE PHARMACEUTICAL CO., LTD
公开号:US20160272594A1
公开(公告)日:2016-09-22
The present invention discloses a preparation method of 2,3-dimethyl phenyl-1-trityl-imidazole-4-ketone. In accordance with this method, imidazole-4-ethyl formate is used as a raw material; ethyl formate is used for amino protection, 1-trityl-1H-imidazole-4-formic acid is obtained after basic hydrolysis; 1-trityl-1H-imidazole-4-formic acid and N,O-dimethylhydroxylamine hydrochloride are subjected to condensation so as to obtain N-methoxyl-N-methyl-1-trityl-1H-imidazole-4-formamide; and N-methoxyl-N-methyl-1-trityl-1H-imidazole-4-formamide and a Grignard reagent prepared by the reaction of 2,3-dimethylbromobenzene with magnesium are subjected to a Grignard reaction, and then the target product 2,3-dimethyl phenyl-1-trityl-1H-imidazole-4-ketone is obtained. Compared with the reported preparation methods, the preparation method is more convenient to operate and is beneficial for industrial production.
本发明公开了2,3-二甲基苯基-1-三苯基-咪唑-4-酮的制备方法。根据该方法,咪唑-4-乙酰甲酸乙酯用作原料;乙酸乙酯用于氨基保护,碱性水解后得到1-三苯基-1H-咪唑-4-甲酸;1-三苯基-1H-咪唑-4-甲酸和N,O-二甲基羟胺盐酸盐进行缩合反应,得到N-甲氧基-N-甲基-1-三苯基-1H-咪唑-4-甲酰胺;N-甲氧基-N-甲基-1-三苯基-1H-咪唑-4-甲酰胺和由2,3-二甲基溴苯与镁反应制备的格氏试剂进行格氏反应,然后得到目标产物2,3-二甲基苯基-1-三苯基-1H-咪唑-4-酮。与已报道的制备方法相比,该制备方法操作更便捷,有利于工业生产。