K. Rajasekhara Raju、B. Shankar Reddy、YS Somannavar、BK Sinha、PN Kishore Babu 和 K. Mohana Raju 化学研发,Aurobindo Pharma Ltd,调查编号 71 和 72,Indrakaran (V),Sangareddy (M) , Medal District 502329, Telangana, India Synthetic Polymer Laboratory, Department of Polymer Science and Technology, Sri Krishnadevaraya University, Anantapur 515055, Andhra Pradesh, India
Disclosed herein are substituted pyrimidine-based endothelin modulators of Formula I, processes of preparation thereof, pharmaceutical compositions thereof, and methods of use thereof.
[EN] PROCESS FOR PREPARATION OF BOSENTAN<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE BOSENTAN
申请人:CADILA HEALTHCARE LTD
公开号:WO2010032261A1
公开(公告)日:2010-03-25
The present invention provides improved processes for preparing Bosentan. The present invention provides novel intermediates like 4,6-dihydroxy-5-(2-methoxy phenoxy)[2,2'] bipyrimidine of formula (II) and N-(6-Chloro-5-(2- ethoxyphenoxy)[2,2'-bipyrimidinyl]-4-t-butyl benzenesulfonamide cesium salt and process for preparation thereof. The invention also disclosed novel polymorphic form of the intermediates.
[EN] A NOVEL PROCESS FOR PREPARATION OF BOSENTAN<br/>[FR] NOUVEAU PROCÉDÉ DE PRÉPARATION DE BOSENTAN
申请人:MEGAFINE PHARMA P LTD
公开号:WO2012020421A1
公开(公告)日:2012-02-16
A novel ammonium salt of Bosentan of formula (VIII); has been disclosed. The salt may be either crystalline or amorphous or mixture of Crystalline and amorphous form. A novel single pot process for the preparations of ammonium salt of Bosentan has been disclosed. The process comprises reacting the 4,6-dichloro-5-(2-methoxyphenoxy)-2,2'- bipyrimidine with 4-tert-butylbenzenesulfonamide in the presence of solvent and a base; adding ethylene glycol to the reaction mass and isolating the ammonium salt of Bosentan. The ammonium salt of Bosentan is converted into Bosentan and further into Bosentan Monohydrate which are substantially free from dimer impurity and 6-hydroxy impurity.
[EN] PROCESS FOR THE PREPARATION OF ENDOTHELIN RECEPTOR ANTAGONISTS<br/>[FR] PROCÉDÉ POUR LA FABRICATION D'ANTAGONISTES DES RÉCEPTEURS DE L'ENDOTHÉLINE
申请人:FARMAPROJECTS S A
公开号:WO2010015623A1
公开(公告)日:2010-02-11
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.