Sodium Carbonate → (S)-tert-butyl 3-(2,5-difluoro-4-(methylsulfonyl)phenylamino)-2-oxo-1,4'-bipiperidine-1'-carboxylate

Participants

Reaction Conditions

Reaction Steps

(S)-tert-butyl 3-amino-2-oxo-1,4′-bipiperidine-1′-carboxylate (4.0 g, 13 mmol), 1,2,4-trifluoro-5-(methylsulfonyl)benzene (Preparation C, 4.2 g, 20 mmol) and Na2CO3 (2.9 g, 27 mmol) were dissolved in DMF (30 mL) and heated at 130° C. overnight. The reaction was concentrated and purified over silica gel (25-75% EtOAc in hexanes) to afford (S)-tert-butyl 3-(2,5-difluoro-4-(methylsulfonyl)phenylamino)-2-oxo-1,4′-bipiperidine-1′-carboxylate (4.6 g, 9.4 mmol, 70% yield) as yellow solid.

Provenance & Evidence