Hydrochloric Acid → HCID 23287784, compound

Participants

Reaction Steps

61 Grams of 8-allyloxy-3,4-dihydro-5-hydroxy-6-(1-piperidinyl)methyl-2(1H)-quinolinone was suspended in 50% ethanol aqueous solution, the suspension was acidified by adding a concentrated hydrochloric acid, then crystals were precipitated immediately. Allowed to stand for a while, the crystals precipitated were collected by filtration, washed with ice-cooled ethanol and dried. The dried crystals were recrystallized from ethanol, there was obtained 40 g of 8-allyloxy-3,4-dihydro-5-hydroxy-6-(1-piperidinyl)methyl-2(1H)-quinolinone hydrochloride as pale yellow needle-like crystals.

Provenance & Evidence