反応 #41744

反応方程式

tert-butyl-4-{1-methyl-2-[(4-methylphenyl)amino)benzimidazol-5-yloxy)pyridine-2-carboxylate

tert-butyl-4-[3-amino-4-(methylamino)phenoxy]pyridine-2-carboxylate

thiourea

trifluoroacetic acid

iodomethane

→

4-{1-methyl-2-[(4-methylphenyl)amino]benzimidazol-5-yloxy)pyridine-2-carboxylic acid

溶媒

methanol

methylene chloride

反応条件

後処理

1. 1
   workup.STIRRINGstirred at ambient temperature overnight
2. 2
   その他Resulting 4-{1-methyl-2-[(4-methylphenyl)amino]benzimidazol-5-yloxy)pyridine-2-carboxylic acid was purified by preparative chromatography

実験手順

To tert-butyl-4-[3-amino-4-(methylamino)phenoxy]pyridine-2-carboxylate (1 eq) in methanol was added 4-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-butyl-4-{1-methyl-2-[(4-methylphenyl)amino)benzimidazol-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-{1-methyl-2-[(4-methylphenyl)amino]benzimidazol-5-yloxy)pyridine-2-carboxylic acid was purified by preparative chromatography. MS: MH+=374.

出典