反应详情

To tert-butyl4-[3-amino-4-(methylamino)phenoxy]pyridine-2-carboxylate (1 eq) in methanol was added 4-bromo-3-fluorobenzeneisothiocyanate (1 eq) and stir at ambient temperature for 16 h. Formation of the corresponding thiourea was followed by LC/MS. To it was then added iodomethane (1 eq) and heated to 60° C. for 2 h. Formation of tert-butyl4-(2-{[4-bromo-3-fluorophenyl]amino)-1-methylbenzimidazol-5-yloxy)pyridine-2-carboxylate was followed by LC/MS. To it in methylene chloride was added trifluoroacetic acid and stirred at ambient temperature overnight. Resulting 4-(2-{[4-bromo-3-fluorophenylamino)-1-methylbenzimidazol-5-yloxy)pyridine-2-carboxylic acid was purified by preparative chromatography. MS: MH+=456.

1. stirringstirred at ambient temperature overnight