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公开(公告)号:US07022845B2
公开(公告)日:2006-04-04
申请号:US10632148
申请日:2003-07-31
IPC分类号: C07D295/00 , C07D265/30 , C07D295/02 , C07D241/04 , C07D233/56
CPC分类号: C07D295/023 , C07D231/12 , C07D233/56 , C07D249/08
摘要: A process for the monomethylation of nitrogenous heterocycles having at least one nitrogen atom bonded to a hydrogen atom by reacting the nitrogenous heterocycle with dimethyl carbonate at a temperature of between 100° and 200° C. and a pressure of between 0.93×105 Pa and 1.07×105 Pa while methanol produced during the reaction is distilled off as it is formed.
摘要翻译: 通过使氮杂环与碳酸二甲酯在100℃和200℃之间的温度和0.93×10 5的压力下反应,使具有至少一个与氢原子键合的氮原子一甲基化的方法 Pa和1.07×10 5 Pa,同时在反应中产生的甲醇在其形成时被蒸馏掉。