1,1'-Carbonyldiimidazole → HCID 178480532, compound

Participants

Reaction Steps

Prepared by the method described for Ex. 17 from 1,5-dihydro-4-methyl-1,5-dioxo-4H-1-benzopyrano[3,4-b]pyridine-2-carboxylic acid (5.42 g, 0.02 mole), 1,1'-carbonyldiimidazole (6.48 g, 0.04 mole) and 5-aminotetrazole monohydrate (2.06 g, 0.02 mole) in dimethylformamide (90 ml). Recrystallization from dimethylformamide gives pale yellow crystals (6.4 g, 95%), m.p. above 300.

Provenance & Evidence