Stannous Chloride → HCID 136395946, compound

Participants

Reaction Steps

1.98 g (8.8 mmol) of tin dichloride were dissolved in 10 ml of conc. hydrochloric acid at 80° C. 494 mg (2 mmol) of 8-nitro-2,3,5,6-tetrahydro-1,2,4-triazolo[4,3-c]quinazoline-3,5-dione were added portionwise thereto. After heating at reflux for 2 hrs. the precipitate was filtered off, washed with water and dried in a vacuum. 315 mg (62%) of 8-amino-2,3,5,6-tetrahydro-1,2,4-triazolo[4,3-c]quinazoline-3,5-dione hydrochloride were obtained as white crystals;

Provenance & Evidence