Methyl iodide → 2-{[4-Bromo-3-methylphenylamino)-6-methoxy-1-methylbenzimidazol-5-yloxy)pyridine-2-carboxylic acid

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Reaction Steps

To tert-butyl4-[3-amino-6-methoxy-4-(methylamino)phenoxy]pyridine-2-carboxylate(1 eq) in methanol was added 4-bromo-3-methylbenzeneisothiocyanate (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-methylphenyl]amino)-1-methylbenzimidazol-5-yloxy)pyridine-2-carboxylate was followed by LC/MS. To it in methylene chloride was added trifluroacetic acid and stirred at ambient temperature overnight. Resulting 4-(2-{[4-bromo-3-methylphenylamino)-6-methoxy-1-methylbenzimidazol-5-yloxy)pyridine-2-carboxylic acid was purified by preparative chromatography. MS: MH+=482.

Provenance & Evidence