反应详情

To a stirred solution of 4-cyanobenzenesulfonyl chloride (411 mg, 2.2 mmol) in CH2Cl2 (10 mL) was added 4-methylaminomethyl-piperidine-1-carboxylic acid tert-butyl ester (500 mg, 2.2 mmol) and triethylamine (0.91 mL, 6.5 mmol) and the reaction stirred at RT for 2 h after which time silica was added and solvent removed. The crude residue was purified by silica gel chromatography eluting with isohexane, and increasing the polarity to 100% EtOAc to afford 4{[4-cyano-benzenesulfonyl)-methyl-amino]-methyl}-piperidine-1-carboxylic acid tert-butyl ester as a white solid (750 mg, 87%).

1. additionwas added
2. customsolvent removed
3. customThe crude residue was purified by silica gel chromatography
4. washeluting with isohexane
5. temperatureincreasing the polarity to 100% EtOAc