Dicyclohexylcarbodiimide → HCID 20290363, compound

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Reaction Steps

The compound produced in Example 2 is dissolved in about 500 milliliters methylene chloride and the solution is chilled under nitrogen to 15° C. in a dry ice-acetone mixture. 4-Dimethylaminopyridine is added and the mixture is stirred for five minutes. A slight excess of dicyclohexylcarbodiimide dissolved in methylene chloride is added with stirring. The chilling source is removed after 15 minutes and the solution is stirred overnight at room temperature. The volume of the reaction mixture is reduced on a rotary evaporator under reduced pressure to about 100 milliliters. A precipitate is removed by filtration and the filter residue is washed several times with methylene chloride. The filtrate and combined washings are washed successively with 1 N, HCl, saturated aqueous NaHCO3, water and saline and the solution is dried over MgSO4. Evaporation of the methylene chloride with a rotary evaporator under reduced pressure yields a white solid which is recrystallized from diethyl ether to yield the title compound.

Provenance & Evidence