Triethylamine → 4-[N-[1-[N-(benzofuran-2-ylcarbonyl)amino]cyclohexanecarbonyl]amino]-1-[2-[N-(ethoxycarbonyl)amino]phenyl]piperidin-3-ol

Participants

Reaction Steps

The solution of 4-[N-[1-[N-(benzofuran-2-ylcarbonyl)amino]cyclohexane carbonyl]amino]-1-(2-aminophenyl)piperidin-3-one (0.9 g) obtained in Step 2 of Example 43 in 20 ml of dichloromethane was cooled to 0° C. 0.54 ml of triethylamine and 0.37 ml of ethyl chloroformate were added to the reaction mixture, which was then stirred for about 3 hours at room temperature. 20 ml of ice water was added to the reaction mixture. The resulting organic layer was dried and concentrated on sodium sulfate. The resulting residue was purified with column chromatography to give 600 mg of the titled compound.

Provenance & Evidence