HCID 19851953, compound → HCID 178439701, compound

Participants

Reaction Steps

A solution of 7.05 g (12.06 mmol) of N-{3-[3-(4-acetyl-3-hydroxy-2-n-propylphenoxy)-propoxy]-2-cyanophenyl}-1-(4-methoxybenzyl)-tetrazole-5-carboxamide in 150 ml of trifluoroacetic acid and 15 ml of anisole is heated under reflux for 30 minutes. The reaction mixture is concentrated under reduced pressure, approximately 200 ml of ether and 300 ml of petroleum ether are added and the crystals are filtered off. The resulting N-{3-[3-(4-acetyl-3-hydroxy-2-n-propylphenoxy)-propoxy]- 2-cyanophenyl}-1H-tetrazole-5-carboxamide having a melting point of 206°-208° is dissolved in 50 ml of acetone while hot, and the calculated amount of triethanolamine in 30 ml of acetone is added thereto. After the addition of ether, crystallisation begins. The triethanolammonium salt of N-{3-[3-(4-acetyl-3-hydroxy-2-n-propylphenoxy)-propoxy]-2-cyanophenyl}-1H-tetrazole-5-carboxamide having a melting point of 81° (decomposition) is obtained.

Provenance & Evidence