1,1'-Carbonyldiimidazole → HCID 178522709, compound

Participants

Reaction Steps

3-Carboxy-7-nitro-4-oxo-4H-pyrimido[2,1-b]benzothiazole (1.34 g.) and 827 mg. of 1,1'-carbonyldiimidazole are added to 60 ml. of dimethylacetamide, and the suspension heated on a steam bath for 15 min. To the resulting solution is added 434 mg. of 5-aminotetrazole and the heating continued for 20 min. The suspension is cooled and filtered. The desired product can be further purified by recrystallization from dimethylformamide.

Provenance & Evidence