Hydrochloric Acid → HCID 21916435, compound

Participants

Reaction Steps

A solution of 14.4 g (54.1 mmol) of ethyl 3-(2,4-dioxo-3,4,5,6,7,8-hexahydro-1(2H)-quinazolinyl)-propanecarboxylate and 6.47 g (270.4 mmol) of lithium hydroxide in 200 ml of a mixture of ethanol and water (4:1) are heated under reflux for one hour. The cooled solution is then mixed with 1 M hydrochloric acid until a pH of 1 is reached, and then concentrated to dryness. The resulting residue is dissolved in about 20 ml of water. On addition of ether, the product is obtained as a precipitate which is filtered off with suction and dried under reduced pressure. This gives 10.2 g (42.8 mmol, 79% yield) of a pale yellow solid.

Provenance & Evidence