[EN] PROCESS FOR PREPARING A PYRIMIDINE INTERMEDIATE<br/>[FR] PROCÉDÉ POUR PRÉPARER UN INTERMÉDIAIRE DE PYRIMIDINE
申请人:ACTELION PHARMACEUTICALS LTD
公开号:WO2015004265A1
公开(公告)日:2015-01-15
The present invention relates to a process for preparing a pyrimidine intermediate, namely the compound of formula I-2 or a salt thereof. Said compound of formula I-2 or its salt can be used to prepare macitentan. Macitentan (chemical names: N-[5-(4-bromophenyl)-6-[2-[(5-bromo- 2-pyrimidinyl)oxy]ethoxy]-4-pyrimidinyl] -N'-propylsulfamide or N-[5-(4-bromophenyl)- 6- 2- [(5 -bromopyrimidin-2-yl)oxy] ethoxy } pyrimidin-4-yl] -N'-propylsulfuric diamide) is an endothelin receptor antagonist that has notably been approved by the US Food and Drug Administration and the European Commission for the treatment of pulmonary arterial hypertension. It has been first disclosed in WO 02/053557. The last step of one of the potential preparation routes described in WO 02/053557, called "Possibility A" and "Possibility B", can be summarised as shown in Scheme Al hereafter.
本发明涉及一种制备嘧啶中间体的方法,即式I-2化合物或其盐。所述的式I-2化合物或其盐可用于制备马西替坦。马西替坦(化学名称:N-[5-(4-溴苯基)-6-[2-[(5-溴-2-嘧啶基)氧基]乙氧基]-4-嘧啶基]-N'-丙基磺酰胺或N-[5-(4-溴苯基)-6-2-[(5-溴嘧啶-2-基)氧基]乙氧基}嘧啶-4-基]-N'-丙基硫酰二胺)是一种内皮素受体拮抗剂,已获得美国食品药品监督管理局和欧洲委员会批准,用于治疗肺动脉高压。该化合物首次在WO 02/053557中披露。WO 02/053557中描述的潜在制备路线之一的最后一步,称为“可能性A”和“可能性B”,可以总结如下所示的Al方案。