Dicyclohexylcarbodiimide → N,N'-Dicyclohexylurea

Participants

Reaction Steps

The targeted formulation disclosed in Example 11 of commonly owned U.S. application Ser. No. 08/851,780, filed May 6, 1997 (the disclosure of which is incorporated herein by reference), was prepared in the following manner: to a cooled (0 to 5° C.) solution of 1,2-dipalmitoyl-sn-glycero-3-succinate 66.8 mg, N-hydroxy-succinimide 11.5 mg, dimethylaminopyridine (DMAP) 2 mg and acetonitrile 40 mL in a 100 mL round bottom flask was added dropwise to a solution of dicyclohexyl carbodiimide (DCC) 20.6 mg in acetonitrile 10 mL. The resulting mixture was stirred for 5 hours. The solid material which formed during the reaction (dicyclohexylurea) was removed by filtration, and the filtrate was concentrated in vacuo to yield 78 mg of a white product of N-DPGS-succinimide.

Provenance & Evidence