Lithium Hydroxide → (E)-1-methyl-2-oxo-1'-(3-(2-(trifluoromethyl)phenyl)acryloyl)spiro[indoline-3,4'-piperidine]-5-carboxylic acid

Beteiligte Stoffe

Reaktionsschritte

To a solution of (E)-methyl 1-methyl-2-oxo-1′-(3-(2-(trifluoromethyl)phenyl)acryloyl)spiro[indoline-3,4′-piperidine]-5-carboxylate (75 mg, 0.16 mmol) in methanol (4 mL) was added a solution of LiOH in H2O (2 M, 4 mL) at rt and the mixture was stirred for 8 h at rt. The reaction mixture was concentrated to remove methanol and extracted with CH2Cl2 twice. The combined organic phases were dried, filtered and concentrated to give (E)-1-methyl-2-oxo-1′-(3-(2-(trifluoromethyl)phenyl)acryloyl)spiro[indoline-3,4′-piperidine]-5-carboxylic acid (106 mg, 65%). 1H NMR (CD3OD): 1.94 (m, 4H), 3.26 (s, 3H), 4.15 (m, 3H), 4.22 (m, 1H), 7.01 (d, 1H), 7.28 (d, 1H), 7.53 (m, 1H), 7.66 (m, 1H), 7.76 (m, 1H), 8.01 (m, 3H), 8.08 (m, 1H).

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