Triethylamine → (S)-2-methyl-1-(4-nitro-3-(trifluoromethyl)phenyl)pyrrolidine

Participants

Reaction Conditions

Reaction Steps

To a solution of 5-fluoro-2-nitrobenzotrifluoride (2.0 g, 9.56 mmol) in CH3CN (20 mL) was added Et3N (2.41 g, 23.90 mmol) followed by the addition of (S)-2-methylpyrrolidine tosylate (3.18 g, 12.43 mmol). The reaction was stirred at 80° C. overnight. The reaction was then quenched with water and the aqueous layer was extracted with DCM. The combined organics were washed with 1N HCl, dried over MgSO4, filtered and concentrated to give (S)-2-methyl-1-(4-nitro-3-(trifluoromethyl)phenyl)pyrrolidine (2.45 g, 94% yield). 1H NMR (400 MHz, DMSO-d6) δ 8.11 (d, J=9.1 Hz, 1H), 6.88 (s, 1H), 6.85 (d, J=2.6 Hz, 1H), 4.17-4.13 (m, 1H), 3.59-3.54 (m, 1H), 3.33-3.28 (m, 1H), 2.14-2.00 (m, 3H), 1.80-1.71 (m, 1H), 1.14 (d, J=6.3 Hz, 3H). LC/MS: m/z 275.3 (M+H)+ at 1.98 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)).

Provenance & Evidence