Trifluoroacetic acid → {5-Fluoro-4-[2-methyl-4-(2,3,4,5-tetrahydrobenzo[b]azepine-1-carbonyl)benzylcarbamoyl]-2-oxo-3,4-dihydro-2H-quinoxalin-1-yl}acetic acid

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Reaction Steps

To a solution of {5-fluoro-4-[2-methyl-4-(2,3,4,5-tetrahydrobenzo[b]azepine-1-carbonyl)benzylcarbamoyl]-2-oxo-3,4-dihydro-2H-quinoxalin-1-yl}acetic acid tert-butyl ester from Example 7B (105 mg, 0.175 mmol) in dichloromethane (4.0 ml) was added trifluoroacetic acid (4.0 ml). The mixture was stirred for 1.5 h, evaporated in vacuo and azeotroped with toluene to give a white solid; yield 95 mg, 100%.

Provenance & Evidence