156185-63-6

7037-49-2

24424-99-5

156185-63-6

The general procedure for the synthesis of N-BOC-4-(3'-hydroxypropyl)-piperidine from 3-(4-piperidinyl)-1-propanol and di-tert-butyl dicarbonate was as follows: 1. Di-tert-butyl dicarbonate (3.66 g, 16.8 mmol) was slowly added to a stirring solution of anhydrous dichloromethane (20 mL) of 3-(4-piperidinyl)-1-propanol (1.60 g, 11.2 mmol) under nitrogen protection and the reaction was carried out at ambient temperature. 2. The resulting reaction mixture was stirred continuously for 2 hours. 3. Upon completion of the reaction, the mixture was purified directly by silica gel column chromatography with the eluent being methanol in dichloromethane (0-3% gradient). 4. The target fraction was collected to afford N-BOC-4-(3'-hydroxypropyl)-piperidine as a clear oil (2.40 g, 88% yield).