Hydrochloric Acid → HCID 17921872, compound

Participants

Reaction Steps

8.2 g (<18 mmol) N-[4-(2,5-dioxo-3,4-diphenyl-2,5-dihydropyr-rol-1-yl)-butyl]-carbamic acid tert-butylester are dissolved in 80 ml ethanol and heated under reflux for two hours after addition of 4.5 ml (54 mmol) concentrated hydrochloric acid. The cooled solution is concentrated under vacuum and the residue is dried under high vacuum. The accumulated crude product is further processed without further purification: Yield 6.3 g of a yellow solid.

Provenance & Evidence