反应详情

温度

85 °C

To a solution of (Z)-phenyl N′-cyano-N-(3,4-difluorophenyl)carbamimidate (286 mg, 1.05 mmol) and 2-(3-bromopropoxy)tetrahydro-2H-pyran (369 mg, 277 μL, 1.57 mmol) in DMF (10.5 mL) was added at room temperature under an atmosphere of nitrogen potassium carbonate (289 mg, 2.09 mmol). The suspension was heated to 85° C. over night. Additional 2-(3-bromopropoxy)tetrahydro-2H-pyran (140 μL, 0.8 mmol) and potassium carbonate (145 mg, 1.05 mmol) were added and the reaction was heated for 5 hours to 85° C. Water was added and the reaction was extracted twice with diethyl ether. The combined organic layers were washed with water and with saturated aqueous sodium chloride solution, dried over sodium sulfate, filtered and the solvent was evaporated under reduced pressure. The title compound was obtained as a light yellow viscous oil (202 mg, 46%) after column chromatography on silica gel using a gradient of heptane/ethyl acetate 4:1 to 1:1 (v/v) as eluent.

1. temperaturethe reaction was heated for 5 hours to 85° C
2. extractionthe reaction was extracted twice with diethyl ether
3. washThe combined organic layers were washed with water and with saturated aqueous sodium chloride solution
4. dry with materialdried over sodium sulfate
5. filtrationfiltered
6. customthe solvent was evaporated under reduced pressure