反应详情

To a stirred, cooled (-20° C.) solution of 3,3,3-trifluoro-2-hydroxy-2-methylpropanoic acid (1.10 g, 7.0 mmol) in N,N-dimethylacetamide (10 mL) was added thionyl chloride (0.83 g, 7.0 mmol) and the mixture stirred at -10° to -15° C. for 1 hour. 4-Amino-2'-fluoro benzophenone (1.00 g, 4.6 mmol) was added in one portion and the reaction mixture stirred at room temperature overnight. The mixture was poured into water and the aqueous solution filtered to yield a brown solid. Purification by flash column chromatography (5% v/v ethyl acetate/methylene chloride) yielded the title propanamide as a white solid (1.23 g, 75%); mp 141°-142° C. 1H-NMR (300 MHz, d6-DMSO): 1.60 (s, 3H, CH3) 7.35-7.42 (m, 2H, aromatic) 7.53-7.59 (m, 2H, aromatic+OH) 7.65-7.68 (m, 1H, aromatic) 7.75 (d, 2H, J=8.5 Hz, aromatic) 7,96 (dd, 2H, J=8.6, 1.7 Hz, aromatic) 10.37 (s, 1H, NH). MS (CI, CH4): 356 (M+1).

1. stirringthe reaction mixture stirred at room temperature overnight
2. filtrationthe aqueous solution filtered
3. customto yield a brown solid
4. customPurification by flash column chromatography (5% v/v ethyl acetate/methylene chloride)