Water → N-[4-(2-Cyanophenylsulfonyl)phenyl]-3,3,3-trifluoro-2-hydroxy-2-methylpropanamide

Participants

Reaction Steps

To a stirred, cooled (-20° C.) solution of 3,3,3-trifluoro2-hydroxy-2-methylpropanoic acid (0.82 g, 5.2 mmol) in N,N-dimethylacetamide (10 mL) was added thionyl chloride (0.62 g, 5.2 mmol) and the mixture stirred at -10° to -15° C. for 1 hour. 4-[(2-Cyanophenyl)sulfonyl]benzeneamine (1.00 g, 3.8 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 decanted from an oily solid which was purified by flash column chromatography (5% v/v ethyl acetate/methylene chloride). Recrystallization from methylene chloride/hexane yielded the title propanamide as a white solid (1.08 g, 72%); mp 156°-158° C. 1H-NMR (250 MHz, d6-DMSO): 1.58 (s, 3H, CH3) 7.59 (s, 1H, OH) 7.88-8.13 (m, 7H, aromatic) 8.31 (d, 1H, J=6.9 Hz, aromatic) 10.50 (s, 1H, OH). MS (CI, CH4): 399 (M+1). Analysis for C17H13F3N2O4S.0.50 H2O: Calculated: C, 50.12; H, 3.46; N, 6.87. Found: C, 49.86; H, 3.17; N, 6.80.

Provenance & Evidence