Preparation of 1,7'-dimethyl-2'-propyl-2,5'-bi-1h-benzimidazole

Details Preparation of 1,7'-dimethyl-2'-propyl-2,5'-bi-1h-benzimidazole Preparation of 1,7'-dimethyl-2'-propyl-2,5'-bi-1h-benzimidazole

C - Chemistry, Metallurgy

07

D

C07D 235/18 (2006.01)

Patent

CA 2615746

The invention relates to a process for preparing 1,7.prime.-dimethyl-2.prime.- propyl-2,5.prime.-bi-1H-benzimidazole of the formula (I) by reacting N-methyl- o-phenylenediamine or salts thereof with 2-propyl-4-methyl-1H-benzimidazole-6- carboxylic acid or salts thereof in the presence of a 1,3,5-triazine and a tertiary amine, and to 1,7.prime.-dimethyl-2.prime.-propyl-2,5.prime.-bi-1H- benzimidazole prepared by this process.

La présente invention concerne la préparation de 1 ,7.prime.-diméthyl-2.prime.-propyl-2,5.prime.-bi-1H-benzimidazol de formule (I), par conversion de N-méthyl-o-phénylène-diamine ou de ses sels avec de l'acide 2-propyl-4-méthyl-1H-benzimidazol-6-carboxylique ou ses sels, en la présence d'une 1 ,3,5-triazine et d'une amine tertiaire, ainsi que du 1 ,7.prime.-diméthyl-2'-propyl-2,5.prime.-bi-1H-benzimidazol préparé grâce à ce procédé.

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