反应详情

3.1 mmol of the cyclopentenol, 3.1 mmol of DCC and 0.1 mmol of PP are dissolved in CH2Cl2 in a 100 ml flask fitted with a CaCl2 tube, 3.1 mmol of the carboxylic acid are added at 0°-5° C. with ice cooling, and the mixture is stirred at room temperature for 24 hours. The precipitated urea is filtered off, the solvent is removed by evaporation, and the crude product is recrystallized a number of times from ethanol.

1. customfitted with a CaCl2 tube
2. filtrationThe precipitated urea is filtered off
3. customthe solvent is removed by evaporation
4. customthe crude product is recrystallized a number of times from ethanol