反应详情

3-Chioropropionyl chloride (3.0 ml, 32 mmol) and piperidine (3.5 ml, 43.5 mmol) were added to a suspension of 2-aminobenzyltriphenylphosphonium bromide (13.0 g, 29 mmol) (synthesised using the procedure of Capuano et al, Chem. Ber., 1986, 119, 2069-2074) in dichloromethane (60 ml) under a nitrogen atmosphere. The mixture was heated at reflux for 30 min. and then cooled to room temperature. Dichloromethane (60 ml) and hydrochloric acid (1N, 50 ml) were added and the precipitated solid was collected by filtration, washed with dichloromethane and dried in vacuo to give 2-(3-chloropropionylamino)benzyltriphenylphosphonium bromide (7.5 g, 48%). The filtrate was diluted with dichloromethane (300 ml) and washed with sodium carbonate (satd., 150 ml). Evaporation of the dichloromethane gave a residue which was triturated with ether (200 ml) and the white solid collected to afford a second crop of product (5.0 g, 32%).

1. customsynthesised
2. temperatureThe mixture was heated
3. temperatureat reflux for 30 min.
4. filtrationthe precipitated solid was collected by filtration
5. washwashed with dichloromethane
6. customdried in vacuo