Benzophenone imine → HCID 86692536, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of 4-(5-bromo-3-methylpyridin-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylic acid tert-butyl ester (4.83 g), palladium(II) acetate (384 mg), (±)-2-(di-tert-butylphosphino)-1,1′-binaphthyl (1.06 g), and tert-butoxysodium (1.97 g) in toluene (34 ml) was added benzophenone imine (2.29 ml), stirred at 120° C. for 3.5 hours, then ethanol (34 ml), water (34 ml), hydroxylamine monohydrate (4.0 g), and sodium acetate (6.73 g) were added thereto at room temperature, and stirred at room temperature for 4 hours. To the reaction solution was added a saturated aqueous solution of sodium hydrogen carbonate, extracted with ethyl acetate, washed with saturated brine, dried over anhydrous sodium sulfate, and then the solvent was evaporated in vacuo. The obtained residue was purified with basic silica gel chromatography (n-hexane/ethyl acetate) to give 4-(5-amino-3-methylpyridin-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylic acid tert-butyl ester (2.4 g) as a yellow oil.

Provenance & Evidence