反応 #41771

反応方程式

tert-butyl4-(2-{[4-chlorophenyl]amino)-1-methylbenzimidazol-5-yloxy)pyridine-2-carboxylate

tert-butyl4-[3-amino-6-methoxy-4-(methylamino)phenoxy]pyridine-2-carboxylate

thiourea

trifluoroacetic acid

iodomethane

→

2-{[4-chlorophenylamino)-6-methoxy-1-methylbenzimidazol-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

実験手順

To tert-butyl4-[3-amino-6-methoxy-4-(methylamino)phenoxy]pyridine-2-carboxylate (1 eq) in methanol was added 4-chlorobenzeneisothiocyanate (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-chlorophenyl]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-chlorophenylamino)-6-methoxy-1-methylbenzimidazol-5-yloxy)pyridine-2-carboxylic acid was purified by preparative chromatography. MS: MH+=424.

出典