Sodium Hydroxide → HCID 68510193, compound

Participants

Reaction Steps

To a solution of 4-(2-amino-4-methyl-phenylamino)-3-hydroxy-piperidine-1-carboxylic acid tert-butyl ester (2 g, 6.23 mmol) and cyclopropanecarboxaldehyde (485 μL, 6.5 mmol) in a 3% H2O/DMF (10 mL) solution was added Oxone® (3.05 g, 4.96 mmol). The mixture was stirred for 1 h and poured into a 0.2 N NaOH solution (25 mL). After stirring for 5 minutes, the aqueous layer was extracted four times with ethyl acetate. The combined organic extracts were washed twice with water, once with brine, dried over Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography (4/1 ethyl acetate/hexanes) to yield 4-(2-cyclopropyl-5-methyl-benzoimidazol-1-yl)-3-hydroxy-piperidine-1-carboxylic acid tert-butyl ester (860 mg, 37%).

Provenance & Evidence