Water → HCID 10760503, compound

Participants

Reaction Steps

To a stirred, cooled (-20° C.) solution of 3,3,3-trifluoro2-hydroxy-2-methylpropanoic acid (0.78 g, 4.9 mmol) in N,N-dimethylacetamide (10 mL) was added thionyl chloride (0.59 g, 4.9 mmol) and the mixture stirred at -10° to -15° C. for 1 hour. 4-Amino-2-hydroxybenzophenone (0.70 g, 3.3 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 precipitate which was dissolved in methylene chloride, dried (MgSO4) and concentrated in vacuo to yield a brown oil. Purification by flash column chromatography (5% v/v ethyl acetate/methylene chloride) yielded the title propanamide as a white solid (0.83 g, 71%); mp 173°-175° C. 1H--NMR (250 MHz, CDCl3): 1.74 (s, 3H, CH3) 3.49 (s, 1H, OH) 7.14 (dd, 1 H, J=8.7, 2.2 Hz, aromatic) 7.28 (d, 1H, J 2.1 Hz, aromatic),7.46-7.65 (m, 6H, aromatic) 8.49 (s, 1H, NH) 12.3 (s, 1H, phenolic OH). MS (CI, CH4): (M+1).

Provenance & Evidence