Formic Acid → 2,4,6-Triamino-5-formylaminopyrimidine hydrate

Participants

Reaction Steps

A suspension of 7.9 g (0.05 mol) of 2,4,6-triamino-5-nitrosopyrimidine in 50 ml of water was mixed with 3.25 g (0.05 mol) of ammonium formate, 13.9 g (0.3 mol) of formic acid and 0.5 g of the palladium catalyst according to Example 1. This mixture was heated for 4 hours to 100° C. After cooling, the catalyst was filtered off, the filtrate concentrated to about 25 ml and neutralised with about 10 ml of 25% aqueous sodium hydroxide solution to pH 7.5. A crystal slurry thereby resulted which was filtered off with suction. In this way, there were obtained 8.1 g (87% of theory) of pale beige crystals of 2,4,6-triamino-5-formylaminopyrimidine hydrate.

Provenance & Evidence