Thiourea → HCID 178508225, compound

Participants

Reaction Steps

Thiourea (0.28g) was added to a refluxing solution of 2-amino-6-chloro-9-(2-benzoyloxyethoxymethyl)purine (1.27g) in isopropanol (40ml). The reaction mixture was heated at reflux for 11/2 hours and then chilled. 9-(2-benzoyloxyethoxymethyl)thioguanine (0.58g, m.p. 199°-202° C.) was removed by filtration. This was added to 40ml of aqueous ammonia (about 7N) and the mixture heated on a stream bath for 10 minutes and then stirred overnight at room temperature. The water and ammonia were removed in vacuo and the residue triturated with acetone and then with ether to remove benzamide. The remaining solid was recrystallized twice from water to give yellow flakes of 9-(2-hydroxyethoxymethyl)thioguanine (0.26g., m.p. 251°-254° C.).

Provenance & Evidence