反应详情

To a stirred, cooled solution of 3,3,3-trifluoro-2-hydroxy-2-methylpropanoic acid (0.15 g) in methylene chloride (10 mL) was added thionyl chloride (0.12 g) and the mixture was stirred at reflux for 3 hours. The mixture was cooled to room temperature, triethylamine (0.11 g) added and the mixture stirred at reflux for 0.5 hour. The mixture was again cooled to room temperature, 3-cyano-4-aminobenzophenone (0.19 g) in tetrahydrofuran (2.5 mL) was added and the mixture stirred at reflux overnight. The solvent was evaporated and the residue portioned between ethyl acetate and 3N HCl. The organic layer was washed with water, dried and evaporated to yield a pale yellow oil. Chromatography (eluent methylene chloride then 2% ethyl ether in methylene chloride) gave the title compound (0.11 g) as a white solid; mp 202°-204° C. Analysis for C18H13F3N2O3.0.5 H2O: Calculated: C, 58.22; H, 3.80; N, 7,54; Found: C, 58.03; H, 3.57; N, 7.26.

1. temperatureat reflux for 3 hours
2. stirringthe mixture stirred
3. temperatureat reflux for 0.5 hour
4. temperatureThe mixture was again cooled to room temperature
5. stirringthe mixture stirred
6. temperatureat reflux overnight
7. customThe solvent was evaporated
8. washThe organic layer was washed with water
9. customdried
10. customevaporated
11. customto yield a pale yellow oil