Rolziracetam → 5-[4-(4-Fluoro-phenyl)-3-oxo-butyl]-pyrrolidin-2-one

Participants

Reaction Steps

Following the procedure described for Preparation 8, Step A, tetrahydro-pyrrolizine-3,5-dione (1.41 g, 10.1 mmol) was reacted with 4-fluorobenzylmagnesium chloride (0.25M in Et2O, 50 mL, 12.5 mmol) over 5 h. Purification by medium pressure chromatography (2% MeOH in CH2Cl2) provided 5-[4-(4-fluoro-phenyl)-3-oxo-butyl]-pyrrolidin-2-one (2.64 g). 1H NMR (CDCl3) δ7.18 (m, 2H), 7.03 (m, 2H), 6.34 (m, 1H), 3.70 (s, 2H), 3.62 (m, 1H), 2.54 (m, (t, 2H), 2.34-2.15 (m, 3H), 1.82-1.61 (m, 3H).

Provenance & Evidence