Sodium hydride → 4-(3-Piperidinomethylphenoxy)butaneamine

Participants

Reaction Steps

A mixture of 3-(1-piperidinylmethyl)phenol (8.7 g) and sodium hydride (1.2 g) in dimethylformamide (60 ml) was stirred at 25° during 3 h. N-(4-Bromobutyl) phthalimide (12.8 g) was added and the mixture was stirred at 25° during 20 h then at 65° for 3 h. The reaction mixture was poured onto water and extracted with ethyl acetate. The solvent was concentrated and the crystalline impurity was removed by filtration. The filtrate was evaporated in vacuo and the residue was dissolved in ethanol and heated at reflux with hydrazine hydrate (2.5 ml) for 3 h. The mixture was filtered and the filtrate distilled to give the title compound as a colourless oil (4.1 g) b.p. 140°/0.1 mm TLC silica, ethyl acetate/water/isopropanol/0.88 ammonia 25:8:15:2, Rf 0.32.

Provenance & Evidence