Acetone → 3-Butyl-6-(isopropylamino)-phthalide

Participants

Reaction Steps

To a solution of 4.1 g (20.0 mmol) of compound obtained in Example 4 in 4 ml of acetone and 96 ml of anhydrous ethanol there is added 10% Pd—C catalyst. The mixture is hydrogenated under a hydrogen pressure of 3-3.5 kg/cm2. After the absorption of hydrogen is complete, the catalyst is filtered off and the filtrate is concentrated in vacuo to dryness. The residue is crystallised from dilute ethanol to give the title compound.

Provenance & Evidence