1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 4-(3-[(5s)-5-(Acetylamino)-9,10,11-trimethoxy-6,7-dihydro-5h-dibenzo[a,c]cyclohepten-3-yl]oxy-3-oxopropyl)benzoic acid

Beteiligte Stoffe

Reaktionsschritte

A solution of N-acetyl-colchicinol (0.357 g; 1 mmol), EDCI (0.23 g; 1.2 mmol), DMAP (0.025 g; 0.2 mmol) and 3-(4-carboxyphenyl)propionic acid (0.233 g; 1.2 mmol) was stirred at ambient temperature overnight. After removal of the solvent by evaporation, the residue was purified by preparative HPLC on reverse phase silica eluting with methanol/ammonium carbonate buffer (2 g/l pH7) (50/50) to give 4-(3-[(5S)-5-(acetylamino)-9,10,11-trimethoxy-6,7-dihydro-5H-dibenzo[a,c]cyclohepten-3-yl]oxy-3-oxopropyl)benzoic acid.

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