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ChemicalBook CAS DataBase List 1-Propylpyrrolidin-2-one
3470-99-3

1-Propylpyrrolidin-2-one synthesis

8synthesis methods
-

Yield:3470-99-3 94%

Reaction Conditions:

with sodium sulfate;Pd-C in ethyl acetate;

Steps:

R.1 Synthesis of 1-propyl-2-pyrrolidone

Reference Example 1 Synthesis of 1-propyl-2-pyrrolidone A suspension of 2-pyrrolidone (40.0 g), propionaldehyde (109.0 g), anhydrous sodium sulfate (106.0 g), and 20% Pd-C (wet, 10.0 g) in ethyl acetate (470 ml) was stirred under an atmosphere of 4 MPa hydrogen at 100°C for 4 hours. After cooling to room temperature, insolubles were filtered and washed with ethyl acetate. The mother liquid was concentrated, and the concentrate was then distilled under reduced pressure (72°C to 77°C/5 mmHg) to give 1-propyl-2-pyrrolidone (56.2 g, 94% yield) as a colorless oil. 1H-NMR (CDCl3, δ, 300 MHz): 0.90 (3H, t, 7.4 Hz), 1.49-1.61 (2H, m), 1.97-2.05 (2H, m), 2.40 (2H, t, J = 8.3 Hz), 3.25 (2H, t, J = 7.6 Hz), 3.39 (2H, t, J = 7.1 Hz).

References:

EP1211239,2002,A1

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