Реакция #46901

Уравнение реакции

1-Cyclopropyl-piperidin-4-ylamine-dihydrochloride

NaHCO3

1-[5-(5-chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-2-trichloromethyl-1H-benzoimidazole-5-carboxylic acid methyl ester

→

1-[5-(5-chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-2-(1-cyclopropyl-piperidin-4-ylcarbamoyl)-1H-benzoimidazole-5-carboxylic acid

Растворители

CH3CN

CH3CN

water

Условия реакции

Обработка

1. 1
   Температураunder reflux
2. 2
   КонцентрированиеThe mixture was concentrated under reduced pressure
3. 3
   ДругоеThe residue was purified by preparative RP-HPLC (CH3CN/H2O gradient and 0.05% formic acid)

Методика

21.0 mg (0.098 mmol) (1-Cyclopropyl-piperidin-4-ylamine-dihydrochloride were dissolved in 3 mL CH3CN and 3 mL water. 82.3 mg (0.98 mmol, 10 equivalents) NaHCO3 were added. Then, a solution of 48.1 mg (0.098 mmol) 1-[5-(5-chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-2-trichloromethyl-1H-benzoimidazole-5-carboxylic acid methyl ester in 2 mL CH3CN was added and the resulting mixture was stirred vigorously for 3 h under reflux. The mixture was concentrated under reduced pressure. The residue was purified by preparative RP-HPLC (CH3CN/H2O gradient and 0.05% formic acid) to give pure 1-[5-(5-chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-2-(1-cyclopropyl-piperidin-4-ylcarbamoyl)-1H-benzoimidazole-5-carboxylic acid in form of a colorless amorphous solid. (Under these conditions the methyl ester was hydrolyzed simultaneously!)

Источник