反应详情

1.52 ml of 1.0M lithium bis(trimethylsilyl)amide/hexane solution were added to THF solution (20 ml) containing 395 mg of N-[1-(2-phenylethyl)-4-ethoxycarbonylpyrazol-3-yl]-N-[(2'-(N-triphenylmethyl-(1H-tetrazol-5-yl))biphenyl-4-yl)methyl]-n-propylamine and 0.18 ml of 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone, at room temperature, and then heated under reflux for 30 minutes. 0.60 ml of 1,2-dibromo-1,1,2,2-tetrafluoroethane was added thereto and heated under reflux for further 30 minutes. 10 ml of ammonium chloride were added to the reaction solution, THF was distilled off under reduced pressure, and the resultant was extracted with 150 ml of dichloromethane. The resulting extract was dried over magnesium sulfate and subjected to silica gel column chromatography (n-hexane-ethyl acetate=2:1) to obtain 363 mg of the intended compound as a pale red, amorphous solid.

1. temperatureunder reflux for 30 minutes
2. temperatureheated
3. temperatureunder reflux for further 30 minutes
4. distillationwas distilled off under reduced pressure
5. extractionthe resultant was extracted with 150 ml of dichloromethane
6. extractionThe resulting extract
7. dry with materialwas dried over magnesium sulfate