1-Butanol → HCID 178451792, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-(2-(4-fluoro-3-(trifluoromethyl)phenyl)-2-oxoethylcarbamoyl)piperidine-1-carboxylic acid tert-butyl ester (29.4 g; 1.00 equiv; 67.99 mmol) in 1-butanol (150 mL; 1.64 mol), add ammonium acetate (15 equiv; 1.02 mol; 78.61 g) followed by TEA (1 equiv; 67.99 mmol; 9.48 mL). Stir the mixture at 160° C. in a sealed tube. After 3 h, cool to RT and partition between EA and water and wash the organic layer with water and brine. Concentrate in vacuo. Triturate the residue in MTBE, filter and dry in vacuo to give the title compound (18.23 g; 44.10 mmol; 64.86%) as a white solid. 1H NMR (300 MHz, DMSO): 12.01 (s, 1H), 8.08-8.04 (m, 2H), 7.70 (d, J=1.4 Hz, 1H), 7.49-7.43 (m, 1H), 3.99 (d, J=12.6 Hz, 2H), 2.92-2.85 (m, 3H), 1.91-1.87 (m, 2H), 1.64-1.51 (m, 2H), 1.41 (s, 9H).

Provenance & Evidence