Hydrochloric Acid → HCID 135823915, compound

Participants

Reaction Steps

To a suspension of 9.18 g. (3.4 × 10-2 mole) of 7-Nitro-1,2,3,5-tetrahydroimidazo[2,1-b]-quinazolin-2-one hydrochloride in 95% ethanol (300 ml.) was added 10 ml. of concentrated hydrochloric acid and 0.45 g. of 10% Pd/C catalyst. The mixture was placed on a Paar hydrogenator, shaken until theoretical hydrogen absorbed, removed and water (150 ml.) added to effect dissolution of precipitate. The mixture was filtered under suction, the catalyst washed with 95% ethanol and the mixture evaporated to dryness yielding 9.02 g. of a yellow powder. Purification of the free base was effected yielding 7-Amino-1,2,3,5-tetrahydroimidazo[2,1-b]quinazolin-2-one; m.p. >275°.

Provenance & Evidence