反应详情

To a solution of 0.15 g (0.33 mmole) of 4-(3-benzyloxycarbonylaminomethyl-phenyl)-piperidine-4-carbonitrile in 20 ml of acetonitrile was added 0.038 g (0.33 mmole) of N-ethylmopholine followed by 0.11 g (0.33 mmole) of TBTU. To this solution was added 0.075 g (0,33 mmole) of 5-phenethylpyridine-3-carboxylic acid in portions over 10 minutes. The mixture was stirred for 2 hours. The solution was concentrated and the residue was purified by flash chromatography using 95:5 dichloromethane:methanol to provide 0.2 g of product: 1H-NMR (300 MHz, CDCl3)δ (TMS) 1.79-2.20 (m, 4H), 2.70-2.82 (m, 4H), 2.90-3.07 (m, 2H), 3.15-3.70 (m, 2H), 4.35-4.40(d, 2H), 5.07-5.25 (d, 2H), 7.10-7.50 (m, 15H), 8.42-8.58 (m, 2H); MS (ESI) m/e 559 (M+H)+.

1. concentrationThe solution was concentrated
2. customthe residue was purified by flash chromatography