4,6-Nonanedione → 4-(5,7-Dipropyl[1,2,4]triazolo[1,5-a]pyrimidin-2-yl)-1-piperazinecarboxylic acid, ethyl ester

Participants

Reaction Steps

A mixture of 4.48 g (0.02 moles) of 4-(5-amino-4H-1,2,4-triazol-3-yl)-1-piperazinecarboxylic acid, ethyl ester, 3.12 g (0.02 moles) of 4,6-nonanedione and 50 ml of glacial acetic acid was refluxed for 12 hours. The resulting solution was evaporated to dryness in vacuo. The residue was partitioned and treated as described in Example 12 and gave 6.77 g of the desired product as colorless crystals, mp 130°-132° C.

Provenance & Evidence