Pyrrolidine → HCID 178442476, compound

Participants

Reaction Steps

Lawsone (2-hydroxynaphthalene-1,4-dione) (1.4 g) and 3,3-dimethyl-butanal (1.0 g) were dissolved in 20 ml THF at room temperature and 795 μl pyrrolidine added before stirring the reaction for a further 20 minutes. The solvent was removed under vacuum and the residue dissolved in benzene (40 ml) before addition of p-toluenesulphonic acid (2.3 g). The mixture was refluxed for 1 hour, cooled then diluted with ether before the organic phase was washed with sodium bicarbonate solution, followed by one wash with dilute HCl and one wash with water followed by drying under vacuum. The product was purified by chromatograpy using 10% EtOAc/petroleum ether eluant and then crystallised from methanol to yield 260 mg; m.p. 126-128° C.

Provenance & Evidence