Hydrochloric Acid → HCID 13060566, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of methyl 4-oxo-9-pivalamido-4H-pyrimido[1,2-C]quinazoline-3-carboxylate (6.5 g) and anhydrous lithium iodide (16.25 g) in dry pyridine (65 ml) was stirred at 100° C. for 1 hour and 30 minutes and at 120° C. for additional 30 minutes. The reaction mixture was concentrated under reduced pressure to give an oily residue, which was dissolved in water. The resulting solution was adjusted to pH 1 with conc. hydrochloric acid to give yellow crystals, which were separated by filtration, washed with water, and dried. The crude crystals were dissolved in a mixture of chloroform and methanol under heating. The solution was filtered to remove insoluble materials. The solution was concentrated under reduced pressure until crystallization began and cooled. The resulting crystals were collected by filtration and dried. There was obtained 4-oxo-9-pivalamido-4H-pyrimido[1,2-C]quinazoline-3-carboxylic acid (2.9 g).

Provenance & Evidence