Dicyclohexylcarbodiimide → HCID 86757837, compound

Participants

Reaction Conditions

Reaction Steps

Fluorenylmethyl glutarate (2.5 kg) (prepared as described in Step 4) and pentafluorophenol (1.63 kg) were dissolved in ethyl acetate (25 L). The solution was treated with a solution of dicyclohexylcarbodiimide (1.83 kg) in ethyl acetate (7.5 L) and the mixture was stirred at 20° C. overnight. The resulting slurry was filtered and the solids were washed through with ethyl acetate (10 L). The filtrate was evaporated at atmospheric pressure to a volume of 7.5 L and diluted with hexane (75 L). The slurry was filtered at 60-65° C. then allowed to cool to room temperature and stirred overnight. The slurry was cooled to 0° C. for 1 hour, the solid collected by filtration and washed with 10:1 hexane/ethyl acetate (15 L). The solid was dried in vacuo at 45° C. to afford the title compound as a white crystalline solid.

Provenance & Evidence