SUBSTITUTED IMIDAZOLONE DERIVATIVES, PREPARATIONS AND USES
申请人:Bouey Edith
公开号:US20100004159A1
公开(公告)日:2010-01-07
The present invention relates to polysubstituted imidazolone derivatives, to the pharmaceutical compositions comprising them and to the therapeutic uses thereof in the human and animal health fields. The present invention also relates to a process for preparing these derivatives.
[EN] PROCESS FOR PREPARING IRBESARTAN<br/>[FR] PROCESSUS POUR PRÉPARER DE L'IRBÉSARTAN
申请人:REDDYS LAB LTD DR
公开号:WO2005113518A1
公开(公告)日:2005-12-01
A process for preparing irbesartan comprises pentanoylation of cycloleucine in the presence of sodium hydroxide to form n-pentanoyl cycloleucine, condensing this product with 2-(4-aminomethyl phenyl) benzonitrile using dicyclohexyl carbodiimide and 1-hydroxy benzotriazole as a catalyst to form the 4-(?-N-pentanoyl amino) cyclopentamido methyl-2'-cyano biphenyl compound, and then cyclizing using trifluroacetic acid in the presence of an aromatic solvent to form cyano irbesartan. Cyano irbesartan is converted to irbesartan by reaction with tributyltin chloride and sodium azide in the presence of an aromatic solvent.
[EN] RUTHENIUM-CATALYZED SYNTHESIS OF BIARYL COMPOUNDS IN WATER<br/>[FR] SYNTHÈSE DE COMPOSÉS BIARYLES DANS L'EAU CATALYSÉE PAR DU RUTHÉNIUM
申请人:CHICAGO DISCOVERY SOLUTIONS LLC
公开号:WO2015054120A1
公开(公告)日:2015-04-16
Using a [RuCl2(arene)]2 complex and a formate source, a directed ortho C-H insertion and aryl-aryl coupling sequence in water provides biaryl compounds useful in the preparation of biologically active molecules and intermediates. Reactions may be conducted in the ambient atmosphere. Ruthenium catalysts prepared from [RuCl2(arene)]2 and a formate source may be prepared in situ or isolated for later use.
A process for the preparation of Irbesartan of formula (I) using the step of,
reacting biphenyl derivative of formula (VIa)
wherein R represents a group selected from —CONH
2
or compound of formula
wherein X represents H or C
1-4
alkyl, preferably methyl;
or any other such group which can be converted to cyano group,
with 1-veleramido cyclopentane carboxylic acid of formula (V)
in the presence of an acid in an organic solvent to give biphenyl derivative of formula (VIIa)
wherein R has the same meaning as mentioned hereinabove.
Provided are a method of making irbesartan via a Suzuki coupling reaction and a novel intermediate, 2-butyl-3-(4′-bromobenzyl)-1,3-diazaspiro[4,4]non-1-ene-4-one, for such process. The novel process includes the step of reacting such intermediate with a protected imidazolephenylboronic acid.