反应详情

2.1 ml of 1.5M lithium diisopropylamide/cyclohexane solution were added to THF solution (35 ml) containing 363 mg of 1-(2-phenylethyl)-3-amino-4-ethoxycarbonylpyrazole and 0.40 ml of 1,3-dimethyl-3,4,5,6-tetrahydro-2(1H)-pyrimidinone, while cooling with dry ice-acetone, and stirred at room temperature for 15 minutes. The mixture was again cooled with dry ice-acetone, and 10 ml of THF solution of 877 mg of 4-bromomethyl-2'-[N-triphenylmethyl-(1H-tetrazol-5yl)]biphenyl were added thereto and stirred at room temperature for 5.5 hours. 10 ml of aqueous ammonium chloride solution was added to the reaction solution, THF was distilled off under reduced pressure, and the resultant was extracted with 50 ml of dichloromethane. The resulting extract was dried over magnesium sulfate and concentrated under reduced pressure. The residue thus obtained was subjected to silica gel column chromatography(n-hexane-ethyl acetate=3;1→2:1) to obtain 234 mg of the intended compound as a pale yellow, amorphous solid.

1. additionwere added
2. stirringstirred at room temperature for 5.5 hours
3. distillationwas distilled off under reduced pressure
4. extractionthe resultant was extracted with 50 ml of dichloromethane
5. extractionThe resulting extract
6. dry with materialwas dried over magnesium sulfate
7. concentrationconcentrated under reduced pressure
8. customThe residue thus obtained