Preparation of 1,7,'-dimethyl-2'-propyl-2,5'-bi-1H-benzimidazole
申请人:Heitger Helmut
公开号:US20070037986A1
公开(公告)日:2007-02-15
A process for preparing 1,7′-dimethyl-2′-propyl-2,5′-bi-1H-benzimidazole of formula (I)
reacting N-methyl-o-phenylenediamine of formula (II) or the salts thereof
with 2-propyl-4-methyl-1H-benzimidazole-6-carboxylic acid of formula (III) or the salts thereof
wherein the coupling and cyclization is achieved using 1,3,5-triazine and tertiary amine.
US6169204B1
申请人:——
公开号:US6169204B1
公开(公告)日:2001-01-02
US7608722B2
申请人:——
公开号:US7608722B2
公开(公告)日:2009-10-27
[EN] NOVEL INTERMEDIATES AND METHOD FOR SYNTHESIS OF 4'-[(1,4'-DIMETHYL-2'-PROPYL-[2,6'- BI-1NOUVEAUX INTERMÉDIAIRES ET PROCÉDÉ DE SYNTHÈSE DE 4'-[(1,4'-DIMÉTHYL-2'-PROPYL-[2,6'- BI-120090924<br/>[FR] NOUVEAUX INTERMÉDIAIRES ET PROCÉDÉ DE SYNTHÈSE DE 4'-[(1,4'-DIMÉTHYL-2'-PROPYL-[2,6'- BI-120090924
申请人:IPCA LAB LTD
公开号:WO2009116089A2
公开(公告)日:2009-09-24
Disclosed herein is a method for synthesis of 4'-[(1,4'-dimethyl-2'-propyl-[2,6'-bi- 1H]benzimidazol]-l-yl)methyl]-[1,1-biphenyl]-2-carboxylic acid or its derivatives, and novel intermediate compounds useful in the synthesis.