1-Hydroxybenzotriazole → Rac-1-acetyl-piperidine-4-carboxylic acid{2-[[6-chloro-3-(3-chloro-benzyl)-2-oxo-2,3-dihydro-1h-indol-3-yl]-(2,2-dimethyl-propyl)-amino]-ethyl}-amide

Participants

Reaction Steps

The mixture 3-[(2-Amino-ethyl)-(2,2-dimethyl-propyl)-amino]-6-chloro-3-(3-chloro-benzyl)-1,3-dihydro-indol-2-one (120 mg, 0.286 mmol), 1-Acetyl-piperidine-4-carboxylic acid (59 mg, 0.344 mmol), EDC.HCl (66 mg, 0.344 mmol), HOBt (46 mg, 0.344 mmol) and DIPEA (111 mg, 0.860 mmol) in dichloro-methane (2 mL) was stirred at room temperature for overnight. The crude was then purified with Prep-HPLC to give 54 mg rac-1-Acetyl-piperidine-4-carboxylic acid{2-[[6-chloro-3-(3-chloro-benzyl)-2-oxo-2,3-dihydro-1H-indol-3-yl]-(2,2-dimethyl-propyl)-amino]-ethyl}-amide of as a white solid. Then 18 mg rac-1-Acetyl-piperidine-4-carboxylic acid{2-[[6-chloro-3-(3-chloro-benzyl)-2-oxo-2,3-dihydro-1H-indol-3-yl]-(2,2-dimethyl-propyl)-amino]-ethyl}-amide was separated by chiral preparative HPLC to obtain 7 mg 1-Acetyl-piperidine-4-carboxylic acid{2-[[(S)-6-chloro-3-(3-chloro-benzyl)-2-oxo-2,3-dihydro-1H-indol-3-yl]-(2,2-dimethyl-propyl)-amino]-ethyl}-amide MS: [M+H]+=573.

Provenance & Evidence