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
PROCESS FOR PREPARATION OF ENDOTHELIAL RECEPTOR ANTAGONIST (BOSENTAN)
申请人:Joshi Shreerang
公开号:US20120136015A1
公开(公告)日:2012-05-31
The present invention relates to processes for the preparation of an endothelial receptor antagonist. The present invention particularly relates to synthesis of 4-tert-butyl-N-[6-(2-hydroxyethoxy)-5-(2-methoxyphenoxy)-2-(2-pyrimidinyl)-4-pyrimidinyl]benzene sulfonamide (bosentan).
[EN] METHOD OF SYNTHESIS OF BOSENTAN, ITS POLYMORPHIC FORMS AND ITS SALTS<br/>[FR] PROCÉDÉ DE SYNTHÈSE DU BOSENTAN, DE SES FORMES POLYMORPHIQUES ET DE SES SELS
申请人:CIPLA LTD
公开号:WO2009083739A1
公开(公告)日:2009-07-09
The present invention relates to alkaline earth metal salts of bosentan, anhydrous bosentan, polymorphic forms thereof, amorphous bosentan and processes for preparing them. The present invention further relates to a process for the preparation of bosentan and its pharmaceutically acceptable salts.
Research and Development of a Second-Generation Process for Bosentan, an Endothelin Receptor Antagonist
作者:Peter J. Harrington、Hiralal N. Khatri、Brad S. DeHoff、Martin R. Guinn、Mark A. Boehler、Karl A. Glaser
DOI:10.1021/op010234i
日期:2002.3.1
A second-generation manufacturing process from 5-(2-methoxyphenoxy)-[2,2'-bipyrimidine]-4,6-(1H,5H)-dione to bosentan is based on the synthesis and deprotection of the tert-butyl ether of bosentan using available and inexpensive ethylene glycol mono-tert-butyl ether. This new strategy triggered a cascade of process improvements. Isolations are reduced from six to three, and drying operations, from five to two. Process solvents are reduced from six to two. The isolations of two sensitizers are eliminated. Toluene is used in place of methylene chloride. Two aqueous waste streams are eliminated by replacing DMF and ethylene glycol by toluene. Two methanol-isopropyl acetate recrystallizations of bosentan are replaced by the decantation of a suspension of bosentan formate monoethanolate in ethanol-toluene. Finally, the overall yield is increased from 67 to 84% and the final product purity improved from 99.3 to 99.7%.