Sodium Sulfate → 4-Phenyl-1,2,4-triazoline-3,5-dione

Participants

Reaction Steps

4-Phenylurazole (25gm) and anhydrous sodium sulphate were suspended in methylene chloride. The suspension was cooled in ice and nitrogen dioxide was passed in until all the 4-phenylurazole dissolved. The solution was filtered and the solvent removed under reduced pressure. The solid was either used as obtained or purified by sublimation (at 100°C and 10-5 mm of mercury).

Provenance & Evidence