Citric Acid → HCID 178456867, compound

Participants

Reaction Conditions

Reaction Steps

To 20 mL of DMF, the total amount of 5-cyano-4-n-propylamino-2-[2-(4-pyridyl)ethylamino]pyrimidine obtained in Step 2 was dissolved, then DMF (16 mL) solution of ammonium chloride (856 mg) and sodium azide (1.04 g) was added thereto, followed by stirring at 100° C. for 24 hours. After completion of the reaction was confirmed by thin-layer chromatography, the reaction mixture was added with chloroform and 5% an aqueous citric acid solution, and then the mixture was separated. The pH of an aqueous layer was adjusted to about 6 and the crystals were precipitated. The crystals were collected by filtration, washed with water, then dried fully under reduced pressure to give 4-n-propylamino-2-[2-(4-pyridyl)ethylamino]-5-tetrazolylpyrimidine [Compound (Z) in which R1 is n-propylamino and R2 is 2-(4-pyridyl)ethylamino] (700 mg, overall yield from 4-chloro-5-cyano-2-methylthiopyrimidine: 22%).

Provenance & Evidence