Dimethylformamide → HCID 57633767, compound

Participants

Reaction Conditions

Reaction Steps

To an ice-cold solution of 3-[[4-cyano-3-(trifluoromethyl)phenyl](2,2,2-trifluoroethyl)amino]-2-methylpropanoic acid (0.050 g, 0.14 mmol) in CH2Cl2 (3 mL), under nitrogen was added oxalyl chloride (0.023 g, 0.18 mmol) and DMF (cat) and the mixture was heated at 42° C. for 30 min. Upon cooling, additional oxalyl chloride (0.014 g, 0.11 mmol) and DMF (cat.) were added and heated for 30 min. Upon cooling, NH4OH (30% aqueous solution, 5 mL) was added and the mixture stirred at rt. After 1 h, the mixture was partitioned between CH2Cl2 and water. The organic phase was washed with 0.1N HCl and brine, dried (Na2SO4) and concentrated in vacuo. The residue was purified by silica gel chromatography (1-5% MeOH—CH2Cl2 gradient) to give the title compound (0.044 g, 88% yield): 1H NMR (400 MHz, CDCl3) δ 7.58 (d, J=8.6 Hz, 1H), 7.01 (d, J=2.6 Hz, 1H), 6.89 (dd, J=8.6, 2.6 Hz, 1H), 5.70 (bs, NH), 5.54 (bs, NH), 4.22-4.08 (m, 2H), 3.85 (dd, J=15.4, 10.3 Hz, 1H), 3.54 (dd, J=15.4, 3.7 Hz, 1H), 2.80-2.70 (m, 1H), 1.23 (d, J=7.0 Hz, 3H).

Provenance & Evidence