1-[(Tert-butoxy)carbonyl]piperidine-2-carboxylic acid → HCID 21060071, compound

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tert-Butyl 2-{N-[(1R)-1-[(4-chlorophenyl)methyl]-2-(4-{2-[(methylsulfonyl)amino]phenyl}piperazinyl)-2-oxoethyl]carbamoyl}piperidinecarboxylate was prepared according to the procedure described in Preparation V by using piperidine-1,2-dicarboxylic acid 1-tert-butyl ester (Aldrich) (82 mg, 0.36 mmol) and (2R)-2-amino-3-(4-chlorophenyl)-1-(4-{2-[(methylsulfonyl}-amino]phenyl)piperazinyl) propan-1-one. The desired compound was isolated as a white solid (106 mg). MS (ESI, pos. ion) m/z: 648 (M+H); (ESI, neg. ion) m/z: 646 (M−H). Calc'd for C31H42ClN5O6S: 647.25.

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