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    • 6. 发明授权
    • Method of preparation of metaxalone
    • 美他沙酮的制备方法
    • US09416116B2
    • 2016-08-16
    • US14742203
    • 2015-06-17
    • AZIENDE CHIMICHE RIUNITE ANGELINI FRANCESCO A.C.R.A.F. S.p.A.
    • Tommaso IacoangeliMario ChiavariniAntonello FazioMarcello MarchettiGiovanni Battista Ciottoli
    • C07D263/24C07D405/06C07D405/14
    • C07D263/24C07D405/06C07D405/14
    • The present invention relates to a method of preparation of metaxalone comprising reaction of triglycidyl isocyanurate (TGIC) with m-xylenol, characterized in that said reaction is carried out in a solvent mixture comprising an aprotic polar solvent with dielectric constant greater than or equal to 30 and at least one other solvent selected from the group comprising apolar solvents and aprotic polar solvents with dielectric constant below 30 said solvent mixture comprising from 5 to 40 wt. % of said first solvent and from 95 to 60 wt. % of said second solvent, adding the TGIC at a temperature between 30° C. and 50° C., and after adding the TGIC, raising the temperature of the reaction solution to a value between 80° C. and 180° C. in a time between 120 and 180 minutes at a rate of increase not greater that 1.25° C. per minute. The invention also relates to a metaxalone with a reduced content of impurities derived from incomplete reactions and/or side reactions of the method of production.
    • 本发明涉及一种含有三聚甘油基异氰脲酸酯(TGIC)与间二甲苯酚反应的美他沙酮的方法,其特征在于所述反应在包含介电常数大于或等于30的非质子极性溶剂的溶剂混合物中进行 和至少一种其它溶剂,其选自包含非极性溶剂和非质子极性溶剂的介质常数低于30的组,所述溶剂混合物包含5至40wt。 所述第一溶剂的%和95至60wt。 %的所述第二溶剂,在30℃至50℃的温度下加入TGIC,并且在加入TGIC之后,将反应溶液的温度升高至80℃至180℃之间的值 时间在120至180分钟之间,增加速率不大于每分钟1.25℃。 本发明还涉及衍生自生产方法的不完全反应和/或副反应的杂质含量降低的美他沙酮。