4-Chloro-2-methylbenzoic acid → (2S)-2-[[1-cyclohexyl-2-(3-furyl)-6-methyl-benzimidazole-5-carbonyl]amino]-3-(5-hydroxy-1H-indol-3-yl)propanoic acid

Participants

Reaction Steps

1-Cyclohexyl-2-furan-3-yl-6-methyl-1H-benzimidazole-5-carboxylic acid was prepared from 4-cyclohexylamino-2-methyl-5-nitrobenzoic acid methyl ester (Example 151) as described for the 4-methyl derivative (Example 151). The acid was coupled to 5-hydroxy-(S)-tryptophan methyl ester hydrochloride in the usual manner and following saponification of the methyl ester and purification by preparative C18 reversed-phase HPLC, the title compound of example 154 was obtained.

Provenance & Evidence