反应详情

O-(7-Azabenzotriazol-1-yl)-N,N,N′,N′,-tetramethyluronium hexafluorophosphate (HATU) (7.50 g, 19.72 mmol), diisopropylethylamine (7.08 mL, 39.45 mmol) and pyrrolidine (1.40 g, 19.72 mmol) were added to a solution of cis-1-(tert-butoxycarbonyl)-6-methylpiperidine-3-carboxylic acid (synthesized by N-Boc protection of cis-6-methylpiperidine-3-carboxylic acid, analogously prepared by the method described in J. Med. Chem. 2011, 54, 1871-1895.) (4.0 g, 16.44 mmol) in anhydrous dichloromethane (40 mL) at room temperature. The reaction mixture was stirred at room temperature for 4 h. Water was added and the mixture was extracted with dichloromethane. The organics were dried over sodium sulfate and concentrated under reduced pressure to afford cis-tert-butyl 2-methyl-5-(pyrrolidine-1-carbonyl)piperidine-1-carboxylate (4.0 g). The material was used without further purification.

1. customanalogously prepared by the method
2. customat room temperature
3. extractionthe mixture was extracted with dichloromethane
4. dry with materialThe organics were dried over sodium sulfate
5. concentrationconcentrated under reduced pressure