Cyclopentylamine → 1-[3-(4-Chloro-benzoylamino)-benzyl]-piperidine-4-carboxylic acid cyclopentylamide

Participants

Reaction Conditions

Reaction Steps

1-Cyclopentylamine (10.7 mg, 0.124 mmol) is added to a solution of [3-(4-chloro-benzoylamino)-benzyl]-piperidine-4-carboxylic acid (35.4 mg, 0.095 mmol) in DMF (0.5 mL). The resulting solution is treated with a solution of HOAT (15.5 mg, 0.114 mmol) in DMF (0.5 mL) followed by si-DCC (200 mg, 0.95 mmol/g, 0.19 mmol), and DIPEA (0.033 mL, 0.19 mmol). The mixture is stirred at 50° C. overnight. PI-DETA (7.99 mmol/g, 0.3 mmol, 37 mg) is added to the solution in order to scavenge the acid, PI-NCO (2.24 mmol/g, 0.3 mmol, 130 mg) is added to scavenge the amine in excess and the mixture is stirred for 1 h. The resin is filtered and washed with a mixture of MeOH/DCM 1:1, (4×1 mL). The resulting solution is evaporated under HV. The title compound is obtained by prep. HPLC F as a colourless powder: LC-MS A: tR=1.21 min; [M+H]+=440.1.

Provenance & Evidence