Ethyl 4-Amino-2-fluorobenzoate → HCID 68699374, compound

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Reaction Steps

4-{[1-(3-Chloro-benzenesulfonyl)-2,3-dihydro-1H-indole-6-carbonyl]-amino}-2-fluoro-benzoic acid, m/z (ES+): 475.18 (M+H+.), was prepared in analogy to example 1, steps 1 to 5. Step 2 was performed using 4-amino-2-fluorobenzoic acid ethyl ester and yielded 2-fluoro-4-[(1H-indole-6-carbonyl)-amino]-benzoic acid ethyl ester. This was reduced to 4-[(2,3-dihydro-1H-indole-6-carbonyl)-amino]-2-fluoro-benzoic acid ethyl ester in step 3. Step 4 was performed using 3-chloro-benzenesulfonyl chloride, yielding 4-{[1-(3-chloro-benzenesulfonyl)-2,3-dihydro-1H-indole-6-carbonyl]-amino}-2-fluoro-benzoic acid ethyl ester, which was hydrolyzed in step 5.

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