10-tert-butyl 6-methyl 13-cyclohexyl-3-fluoro-7H-indolo[2,1-a][2]benzazepine-6,10-dicarboxylate → 10-tert-butyl 6-methyl 13-cyclohexyl-3-fluoro-5-methyl-7H-indolo[2,1-a][2]benzazepine-6,10-dicarboxylate

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The title product 10-tert-butyl 6-methyl 13-cyclohexyl-3-fluoro-5-methyl-7H-indolo[2,1-a][2]benzazepine-6,10-dicarboxylate 20a was synthesized following the procedure reported for the synthesis of 10-tert-butyl 6-methyl 13-cyclohexyl-3-fluoro-7H-indolo[2,1-a][2]benzazepine-6,10-dicarboxylate 19a, using tert-butyl 2-(2-acetyl-4-fluorophenyl)-3-cyclohexyl-1H-indole-6-carboxylate 33c instead of tert-butyl 3-cyclohexyl-2-(4-fluoro-2-formylphenyl)-1H-indole-6-carboxylate 32d, and was obtained in 11% yield as a white solid; m/z 504 [M+H]+.

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