Triethylamine → N-tert-butyloxycarbonyl-4-(4-amino-5-chloro-2-methoxyphenylcarbonylaminomethyl)piperidine

Participants

Reaction Conditions

Reaction Steps

4-amino-5-chloro-2-methoxybenzoic acid (compound of formula 9) (16.6 g, 82.28 mmol) was dissolved in dimethylformamide (166 mL) and the solution was cooled to 0° C. Then, tertiary butyl 4-(aminomethyl)piperidine-1-carboxylate (21.16 g, 98.74 mmol), triethylamine (11.56 mL, 246.84 mmol), N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (EDC, 20.51 g, 106.96 mmol), and 1-hydroxybenzotriazole (HOBT, 16.68 g, 123.42 mmol) were added thereto. The reaction mixture was warmed to room temperature, stirred for 4 hours, and extracted with ethyl acetate and water. The organic layer was dried over anhydrous magnesium sulfate and concentrated under reduced pressure to afford the title compound (31.4 g, 96%).

Provenance & Evidence