Dicyclohexylcarbodiimide → 4-[[(3-Chloro-4-methoxyphenyl)methyl]amino]-6-cyano-3-quinolinecarboxylic acid pentafluorophenyl ester

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Reaction Steps

To 275 mg (0.748 mmol) of 4-[[(3-chloro-4-methoxyphenyl)-methyl]amino]-6-cyano-3-quinolinecarboxylic acid was added 276 mg (1.50 mmol, 2.0 eq) pentafluorophenol, and the mixture was dispersed in 5 mL anhydrous DMF under nitrogen. To this dispersion was added a solution of 231 mg (1.12 mmol, 1.5 eq) of dicyclohexylcarbodiimide (Aldrich) in 2 mL anhydrous ethyl acetate at RT. The resulting mixture was stirred for 18 hours. The reaction was then diluted with 10 mL EtAc, and the white precipitate was filtered and discarded. The filtrate was concentrated in vacuo, and the residue was triturated with 5% MeOH/95% CH 2Cl2 to give 164 mg (0.307 mmol, 41% yield) of the title compound as a white solid: LC/MS: M/Z 534 (M+H) observed, 100% purity; mp: decomposed 215-217° C. LC: 4.15.

Provenance & Evidence