Invented are non-peptide TPO mimetics. Also invented are novel processes and intermediates used in the preparation of the presently invented compounds. Also invented is a method of treating thrombocytopenia, in a mammal, including a human, in need thereof which comprises administering to such mammal an effective amount of a selected hydroxy-
1
-azobenzene derivative.
Preparation process of an agonist of the thrombopoietin receptor
申请人:Esteve Química, S.A.
公开号:EP2799425A1
公开(公告)日:2014-11-05
It relates to a preparation process of 2'-(benzyloxy)-3'-nitro-1,1'-biphenyl-3-carboxylic acid or a salt thereof comprising reacting 2-(benzyloxy)-1-bromo-3-nitrobenzene with a either 3-carboxyphenylboronic acid or a salt thereof or a (C1-C4)-alkyl ester thereof in the presence of Pd(OAc)2, tricyclohexylphosphine, a base, an appropriate solvent, and at an appropriate temperature; if appropriate, submitting the compound thus obtained to a hydrolysis reaction; and isolating the compound thus obtained in form of a salt of compound of formula (VI) or in form of the free acid by adding an acid. It also comprises the further preparation to eltrombopag or its salts from the new intermediate thus obtained by subsequent reduction of the nitro group and deprotection of the phenol, conversion of the amine intermediate obtained in a diazonium derivative, and either (1) subsequent reaction with ethyl acetoacetate and with (3,4-dimethylphenyl)hydrazine or a salt thereof, occurring the pyrazole ring formation by intermolecular cyclization, or (2) introduction of the pyrazole ring by reaction with 1-(3,4-dimethylphenyl)-3-methyl-3-pyrazolin-5-one.
[EN] THROMBOPOIETIN MIMETICS<br/>[FR] MIMETIQUES DE LA THROMBOPOIETINE
申请人:SMITHKLINE BEECHAM CORP
公开号:WO2003103686A1
公开(公告)日:2003-12-18
Invented are non-peptide TPO mimetics. Also invented are novel processes and intermediates used in the preparation of the presently invented compounds. Also invented is a method of treating thrombocytopenia, in a mammal, including a human, in need thereof which comprises administering to such mammal an effective amount of a selected hydroxy1-azobenzene derivative.