Pentanenitrile, 4,4-dimethyl-3-oxo- → ethyl 3-(3-(3-t-butyl-5-amino-1H-pyrazol-1-yl)phenyl)propanoate

Participants

Reaction Steps

A mixture of 3-(3-hydrazinophenyl)propionic acid ethyl ester (13 g, 53.3 mmol) and 4,4-dimethyl-3-oxopentanenitrile (6.9 g, 55 mol) in EtOH (150 mL) was heated at reflux overnight. The reaction solution was evaporated under vacuum. The residue was purified by column chromatography to yield ethyl 3-(3-(3-t-butyl-5-amino-1H-pyrazol-1-yl)phenyl)propanoate (14.3 g, 85% yield) as a white solid. 1H NMR (300 MHz, DMSO-d6); δ 7.50-7.42 (m, 4H), 5.63 (s, 1H), 5.14 (s, 2H), 4.04 (q, J=6.9 Hz, 2H), 2.92 (t, J=7.5 Hz, 2H), 2.66 (t, J=7.5 Hz, 2H), 1.27 (s, 9H), 1.16 (t, J=7.5 Hz, 3H); MS (ESI) m/z: 316 (M+H+).

Provenance & Evidence