Trifluoroacetic acid → 4-[2-Methyl-4-(3-methyl-4,10-dihydro-3H-2,3,4,9-tetraaza-benzo[f]azulene-9-carbonyl)-phenoxy]-butyric Acid

Participants

Reaction Steps

Trifluoroacetic acid (5 ml) was added to a solution of 4-[2-methyl-4-(3-methyl-4,10-dihydro-3H-2,3,4,9-tetraaza-benzo[f]azulene-9-carbonyl)-phenoxy]-butyric acid tert-butyl ester from Example E76.1 (80 mg, 0.17 mmol) in dichloromethane (10 ml). The mixture was stirred for 2 h at room temperature, concentrated in vacuo and azeotroped with dichloromethane to yield the title compound (71 mg, 100%).

Provenance & Evidence