反应详情

温度

60 °C

To a solution of 5-bromo-2,3-bis(bromomethyl)pyridine (Step 2 above, 5.6 g, approximately 16.3 mmol) in DMF (40 mL) was added trityl amine (5.3 g, 20.6 mmol) followed by diisopropylethylamine (8.6 mL, 49 mmol). The resulting solution was warmed to 60° C. and stirred at this temperature for 2.5 hr. The mixture was then concentrated under reduced pressure and the residue was purified by silica chromatography (50 g silica, eluted with 10-100% dichloromethane in hexanes) to give the title compound as a foam.

1. concentrationThe mixture was then concentrated under reduced pressure
2. customthe residue was purified by silica chromatography (50 g silica, eluted with 10-100% dichloromethane in hexanes)