1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 68157476, compound

Participants

Reaction Steps

To a mixture of ethyl 3-aminopropanoate hydrochloride (418 mg, 2.72 mmol), 4-(1-(4-(4-(trifluoromethyl)-1H-pyrazol-1-yl)phenylamino)butyl)benzoic acid (732 mg, 1.82 mmol), 1-hydroxybenzotriazole hydrate (292 mg, 1.91 mmol), and N,N-diisopropylethylamine (1.20 mL, 7.26 mmol) in tetrahydrofuran (18.2 mL) was added 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (557 mg, 2.90 mmol). The mixture was stirred for 48 hours at ambient temperature. The reaction mixture was concentrated and the crude material was purified by column chromatography (0-100% ethyl acetate in heptane) to afford racemic ethyl 3-(4-(1-(4-(4-(trifluoromethyl)-1H-pyrazol-1-yl)phenylamino)butyl)benzamido)propanoate (684 mg, 85%) as a solid. The racemate was further purified via chiral SFC to afford 300 mg of Isomer 1 and 300 mg of Isomer 2, which were used in conversion to the final enatiopure products. 1H NMR (400 MHz, CDCl3, δ): 7.94 (q, J=0.8 Hz, 1H), 7.81 (s, 1H), 7.73 (d, J=8.2 Hz, 2H), 7.39 (d, J=8.2 Hz, 2H), 7.32 (d, J=9.0 Hz, 2H), 6.84 (t, J=5.8 Hz, 1H), 6.53 (d, J=8.8 Hz, 2H), 4.42-4.34 (m, 1H), 4.31 (d, J=4.7 Hz, 1H), 4.16 (q, J=7.2 Hz, 2H), 3.71 (q, J=6.1 Hz, 2H), 2.63 (t, J=5.9 Hz, 2H), 1.88-1.71 (m, 2H), 1.53-1.31 (m, 2H), 1.27 (t, J=7.0 Hz, 3H), 0.95 (t, J=7.3 Hz, 3H). Chiral SFC: Chiralpak AD-H, 10×250 mm; Mobile Phase 65:35 CO2/methanol, 65 mL/min, Retention time: 3.95 min (Isomer 1), 6.81 min (Isomer 2).

Provenance & Evidence