Hydrochloric Acid → 6-Amino-3-butyl-5-nitro-phthalide

Participants

Reaction Steps

To a suspension of 29.2 g of compound obtained in Step A in 25 ml of 95% ethanol there are added 15 ml of hydrochloric acid and 20 ml of water. The mixture is refluxed for 3 hours and put aside at room temperature overnight The solvents are removed under reduced pressure. The residue is treated with 5% NaOH; the solid is collected and washed with water, dried, and crystallised from ethanol giving the title compound.

Provenance & Evidence