The present invention relates to a process for the preparation of endothelin receptor antagonists, in particular bosentan, in which a compound of formula (II) reacts with an alkylating agent X-R formula (II), wherein R is either -CH2CH2OH or a group that can be transformed into - CH2CH2OH; X is a leaving group; and R2 is a 4-terf-butylbenzenesulfonamido group or a group that can be transformed into 4-terf-butylbenzenesulfonamido group; and further transforming the resulting product into bosentan. Useful intermediates are disclosed, its use for the preparation of bosentan, as well as pharmaceutical compositions comprising the product obtained by the above process.
本发明涉及一种制备内皮素受体拮抗剂的方法,特别是博生坦的方法,其中式(II)的化合物与一种烷基化试剂X-R式(II)发生反应,其中R要么是-CH2CH2OH,要么是可转化为-CH2CH2OH的基团;X是一个脱离基团;R2是一个4-
叔丁基苯磺酰胺基团或可转化为4-
叔丁基苯磺酰胺基团的基团;进一步将得到的产物转化为博生坦。公开了有用的中间体,其用于制备博生坦,以及包含通过上述方法得到的产物的药物组合物。