Nitrite → HCID 54532968, compound

Participants

Reaction Conditions

Reaction Steps

Under heating, 0.3 g of 5H-pyrimido[5,4-b]indole-2-carboxylic acid hydrazide (Example 5) is dissolved in a mixture of 6 ml of glacial acetic acid and 2.4 ml of water. Then, a solution of 0.33 g of sodium nitrite in 1 ml of water is added gradually thereto at 0° C. After adding the nitrite, the mixture is stirred for another 4 hours at 0° C., thereafter rendered alkaline with sodium carbonate solution, and the thus-crystallized 5H-pyrimido[5,4-b]indole-2-carboxylic acid azide is vacuum-filtered. The yield is 0.3 g.

Provenance & Evidence