2-Dimethylaminopyridine → (3-Piperidin-4-yl-benzyl) carbamate

Participants

Reaction Steps

p-Nitrophenyl carbonate Wang resin (11.00 g, 15 mmol) and anhydrous dimethylformamide (100 ml) were placed in a peptide synthesis vessel and the resin was allowed to swell for 15 minutes. This was then treated with 4-(3-aminomethyl-phenyl)-piperidine-1-carboxylic acid 2-trimethylsilanyl-ethyl ester hydrochloride (7.50 g, 21 mmol) in 50 ml dimethylformamide, dimethylaminopyridine (0.72, 6 mmol) and diisopropylethyl-amine. The peptide vessel was shaken at room temperature for 24 hours, then washed thoroughly with dimethylformamide (×5), methanol (×2), dimethylformamide (×2), methanol (×2), dichloromethane (×3), methanol (×2), dichloromethane (×2), methanol (×3), and dried. The resin was then treated with tetrahydrofuran to swell the resin and then allowed to drain. Then anhydrous tetrahydrofuran (100 ml) and tetrabutylammonium fluoride (75 ml, 1M in tetrahydrofuran) were added and the resin shaken for 18 hours. The resin was drained and washed with tetrahydrofuran (×5), methanol (×3), dichloromethane (×3), methanol (×3), dichloromethane (×3), methanol (×3) and dried to give (3-piperidin-4-yl-benzyl) carbamate Wang resin (12.30 g).

Provenance & Evidence