Triethylamine → [1-(4-Fluoro-phenylcarbamoyl)-4-(4-isopropyl-phenylcarbamoyl)-piperidin-4-yl]-carbamic acid tert-butyl ester

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A mixture of 36 mg (0.1 mmol) [4-(4-Isopropyl-phenylcarbamoyl)-piperidin-4-yl]-carbamic acid tert-butyl ester, 16.5 mg (0.12 mmol) 4-fluorophenyl isocyanate and 32 mg (0.31 mmol) NEt3 in 1 mL DCM was shaken at room temperature over night. After evaporation to dryness the residue was subjected to purification by preparative HPLC on reversed phase eluting with a gradient formed from acetonitrile, water and HCOOH. The product containing fractions were evaporated to yield 38.5 mg (77%) of the title compound. MS (m/e): 499.3 [(M+H)+].

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