Tetrahydrofuran → Ethyl N-{[4-(2-tert-butylphenyl)piperazin-1-yl]carbonyl}-beta-alaninate

Participants

Reaction Steps

A mixture of 1-(2-tert-butylphenyl)piperazine dihydrochloride obtained in Reference Example 1 (400 mg), ethyl 3-isocyanatopropionate (286 mg), triethylamine (0.418 mL), and tetrahydrofuran (20 mL) was stirred at room temperature for over-night. Water was added to the reaction solution, and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure to provide the title compound (470 mg, 95%) as a colorless solid.

Provenance & Evidence