The present invention relates to technical field of chemical synthesis of drugs, and provides a preparation method of Macitentan and intermediate compound thereof. Adding. THF solution containing compound II and 5-bromo-2-chloropyrimidine slowly into THF solution containing base to react, or adding THF solution containing compound II and THF solution containing 5-bromo-2-chloropyrimidine slowly at the same time into THF solution containing base to react and obtain Macitentan (shown as compound I), wherein the base is selected from sodium hydride, potassium hydride, lithium hydride or lithium bis(trimethylsilyl)amide. The selectivity of the preparation method is very good, which is suitable for industrial production. The obtained product Macitentan has good quality and high yield. And the product compound II also has good quality and high yield, its HPLC purity is up to 99.0%, the content of impurity A is less than 0.20%, the content of impurity B is less than 0.25%.
                            本发明涉及药物
化学合成技术领域,并提供了Macitentan及其中间化合物的制备方法。将含有化合物II和5-
溴-2-
氯吡啶的THF溶液缓慢加入含有碱的THF溶液中反应,或者同时将含有化合物II和含有5-
溴-2-
氯吡啶的THF溶液缓慢加入含有碱的THF溶液中反应并获得Macitentan(表示为化合物I),其中碱选自氢化
钠、
氢化钾、氢化
锂或
叔丁基锂。该制备方法的选择性非常好,适用于工业生产。所得产品Macitentan质量好,产率高。而且产物化合物II也具有良好的质量和高产率,其HPLC纯度高达99.0%,杂质A的含量低于0.20%,杂质B的含量低于0.25%。