Potassium Carbonate → Tert-butyl 3-((8-((2,3-dihydrobenzo[b][1,4]dioxin-2-yl)methyl)-4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate

Participants

Reaction Conditions

Reaction Steps

To a solution of tert-butyl 3-((4-oxo-1-phenyl-1,3,8-triazaspiro[4.5]decan-3-yl)methyl)benzoate (0.23 g, 0.55 mmol) and potassium carbonate (0.114 g, 0.83 mmol) in N,N-dimethylformamide (5 mL), was added 2-(bromomethyl)-2,3-dihydrobenzo[b][1,4]dioxine (0.082 mL, 0.55 mmol, d=1.533). After stirring at 55° C. for 18 hours, the reaction mixture was filtered, concentrated and isolated by preparatory TLC (7% methanol/dichloromethane) to obtain the title compound (0.17 g, 54%); 1H NMR (DMSO-d6): δ 1.52 (s, 9H), 1.63 (d, 2H, J=12 Hz), 2.54-2.60 (m, 2H), 2.65 (d, 2H, J=6 Hz), 2.81-2.93 (m, 6H), 3.99-4.04 (m, 1H), 4.37 (dt, 2H, J=10.4 and 2.4 Hz), 4.60 (d, 2H, J=11.2 Hz), 6.76-6.88 (m, 7H), 7.23 (t, 2H, J=8.8 Hz), 7.48-7.55 (m, 2H), 7.79 (m, 1H), 7.83 (dt, 1H, J=7.2 and 2 Hz); MS for C34H39N3O5 m/z 570.12 (M+H)+.

Provenance & Evidence