Concise Synthesis of Telmisartan via Decarboxylative Cross-Coupling
作者:Lukas J. Goossen、Thomas Knauber
DOI:10.1021/jo801937h
日期:2008.11.7
An efficientsynthesis of the angiotensin II receptor antagonist telmisartan is presented involving a decarboxylativecross-coupling of isopropyl phthalate (1) with 2-(4-chlorophenyl)-1,3-dioxolane (2c) as the key step (85% yield). The benzimidazole moiety is constructed regioselectively via a reductive amination-condensation sequence, replacing the previously published route via alkylation of the
[EN] PROCESS FOR PREPARING TELMISARTAN<br/>[FR] PROCÉDÉ DE PRÉPARATION DE TELMISARTAN
申请人:KRKA TOVARNA ZDRAVIL D D NOVO
公开号:WO2009004064A1
公开(公告)日:2009-01-08
Novel processes for preparing a telmisaitan nitrile intermediate (4'-[2-n-propyl-4- methyI-6-f l-methyJbenzimidazol-2-yl)-benzimidazol- l -yl)-methyl]-biphenyl-2-nitrile) and further converting it to telmisaitan and/or salts thereof are disclosed.