4-Methylmorpholine → 6-chloro-N5-(1-cyanocyclopropyl)-N2-{2,2,2-trifluoro-1-[3-(trifluoromethyl)phenyl]ethyl}-1H-indole-2,5-dicarboxamide

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Reaction Steps

6-Chloro-2-({2,2,2-trifluoro-1-[3-(trifluoromethyl)phenyl]ethyl}carbamoyl)-1H-indole-5-carboxylic acid (2.74 g, 5.07 mmol, 86% pure) was dissolved in N,N-dimethylformamide (14 ml), and 1-aminocyclopropanecarbonitrile hydrochloride (0.78 g, 6.59 mmol), N-[(1H-benzotriazol-1-yloxy)(dimethylamino)methylene]-N-methylmethanaminium hexafluorophosphate (2.12 g, 5.07 mmol) and 4-methylmorpholine (1.54 g, 15.2 mmol) were added. The reaction mixture was stirred at room temperature for 16 h and then ethyl acetate was added. The organic phase was washed with hydrochloric acid (1 mol/l) and the aqueous phase was once again extracted with ethyl acetate. The combined organic phases were washed with saturated sodium chloride solution and the portion which was insoluble in both phases was filtered off. The filtercake is triturated with boiling ethyl acetate (15 ml) and the precipitate is washed with warm ethyl acetate. This leaves 2.01 g (74% of theory) of 6-chloro-N5-(1-cyanocyclopropyl)-N2-{2,2,2-trifluoro-1-[3-(trifluoromethyl)phenyl]ethyl}-1H-indole-2,5-dicarboxamide.

Provenance & Evidence