反应详情

A 25 mL round bottom flask at rt was charged with (R)-3-fluoropyrrolidine hydrochloride (124 mg, 0.99 mmol). To this was added potassium carbonate (365 mg, 2.64 mmol), 3-(2-bromoethoxy)-8-chloro-1,5-naphthyridine (190 mg, 0.66 mmol), sodium iodide (149 mg, 0.99 mmol) and DMF (2 mL). Reaction mixture placed in oil bath preheated to 60° C. and allowed to stir for 16 hrs. Reaction mixture passed through celite cake, rinsed with 10% MeOH/DCM and filtrate concentrated to afford yellow oil. This was purified by ISCO silica gel chromatography (20-40% EtOAC/Hexanes) to afford (R)-8-chloro-3-(2-(3-fluoropyrrolidin-1-yl)ethoxy)-1,5-naphthyridine (105 mg, 54% yield). MS [M+H]=296.2. Calc'd for C14H5ClFN3O=295.7. The following compounds were prepared in a similar fashion as 8-chloro-3-(2-(3-fluoropyrrolidin-1-yl)ethoxy)-1,5-naphthyridine:

1. customReaction mixture
2. customplaced in oil bath
3. custompreheated to 60° C.
4. customReaction mixture
5. washrinsed with 10% MeOH/DCM and filtrate
6. concentrationconcentrated
7. customto afford yellow oil
8. customThis was purified by ISCO silica gel chromatography (20-40% EtOAC/Hexanes)