反应详情

2-(4-Methyl-3-oxopiperazin-1-yl)-2-phenylacetic acid (170 mg, 0.68 mmol) was suspended in dry THF (6 ml) and DCC (283 mg, 1.37 mmol), HOBT (185 mg, 1.37 mmol) and (R)-quinuclidin-3-ol (174 mg, 1.37 mmol) were sequentially added. The reaction was stirred at room temperature for two days and then the insoluble was filtered off. The solution was evaporated and the residue was purified by flash chromatography (DCM/MeOH/NH4OH=96/4/0.4) to obtain (R)-quinuclidin-3-yl 2-(4-methyl-3-oxopiperazin-1-yl)-2-phenylacetate (175 mg, 54.1% yield over 2 steps) as a off-white spongy solid

1. filtrationthe insoluble was filtered off
2. customThe solution was evaporated
3. customthe residue was purified by flash chromatography (DCM/MeOH/NH4OH=96/4/0.4)