3-Bromopyridine → tert-Butyl 8-(pyridin-3-yl)-2,8-diazaspiro[4.5]decane-2-carboxylate

Participants

Reaction Conditions

Reaction Steps

Sodium t-butylate (5.4 mmol, 3.0 eq.) was added to a stirred solution of tert-butyl 2,8-diazaspiro[4.5]decane-2-carboxylate (1.8 mmol, 1.0 eq.) and 3-bromopyridine (1.8 mmol, 1.0 eq.) in toluene (30 ml) and the reaction mixture was degassed with N2. BINAP (0.108 mmol, 0.06 eq.) and Pd(OAc)2 (0.036 mmol, 0.02 eq.) were added and the reaction mixture obtained was heated at 120° C. for 12 h. The reaction mixture was filtered over Celite and the filtrate was concentrated in vacuo. The crude product was purified by column chromatography (silica gel, 30% ethyl acetate in hexane) in order to obtain the desired product. Yield: 69%

Provenance & Evidence