反应详情

温度

60 °C

A mixture of 4-isothiocyanato-2-trifluoromethylbenzonitrile (1a) (0.171 g, 0.75 mmol) and 441-cyanocyclopentylamino)-2-fluorobenzonitrile (54b) (0.115 g, 0.5 mmol) in dry DMF (1 ml) was heated under microwave irradiation at 60° C. for 48 hours. To this mixture were added methanol (3 ml) and aq 2M HCl (2 ml). The second mixture was refluxed for 1 hour. After being cooled to room temperature, the reaction mixture was poured into cold water (10 ml) and extracted with ethyl acetate (15 ml). The organic layer was dried over MgSO4, concentrated and chromatographed (dichloromethane:acetone, 98:2) to yield 4-[1-(4-cyano-3 -fluorophenyl)-4-oxo-2-thioxo-1,3-diazaspiro[4.4]non-3-yl]-2-trifluoromethylbenzonitrile (54c) [RD168] (0.017 g, 0.037 mmol, 7%), of which the structure is illustrated in Formula 30, as an off-white powder.

1. temperatureThe second mixture was refluxed for 1 hour
2. temperatureAfter being cooled to room temperature
3. extractionextracted with ethyl acetate (15 ml)
4. dry with materialThe organic layer was dried over MgSO4
5. concentrationconcentrated
6. customchromatographed (dichloromethane:acetone, 98:2)