Dimethylamine, hydrochloride → (E)-N,N,1-trimethyl-2-oxo-1'-(3-(2-(trifluoromethyl)phenyl)acryloyl)spiro[indoline-3,4'-piperidine]-5-carboxamide

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Reaction Steps

To a mixture of (E)-1-methyl-2-oxo-1′-(3-(2-(trifluoromethyl)phenyl)acryloyl)spiro[indoline-3,4′-piperidine]-5-carboxylic acid (20 mg, 0.508 mmol), EDCI (18 mg, 0.088 mmol), HOBt (12 mg, 0.088 mmol), and DIEA (60 mg, 0.44 mmol) in CH2Cl2 was added NHMe2.HCl (16 mg, 0.176 mmol) at 0° C. The mixture was stirred at rt overnight. The mixture was concentrated to give the crude product, which was purified by preparative TLC to give (E)-N,N,1-trimethyl-2-oxo-1′-(3-(2-(trifluoromethyl)phenyl)acryloyl)spiro[indoline-3,4′-piperidine]-5-carboxamide (6 mg, 14%). 1H NMR (400 MHz, CDCl3): δ=3.05 (m, 6H), 3.25 (m, 3H), 3.60-3.75 (m, 2H), 3.95 (m, 2H), 4.15 (m, 1H), 4.35 (m, 1H), 6.85 (m, 1H), 7.35 (m, 1H), 7.45 (m, 2H), 7.55 (m, 1H) 7.70 (m, 2H), 8.00 (m, 1H).

Provenance & Evidence