Phosphorus oxychloride → 4-Chloro-2-(pyrrolidin-1-yl)pyrimidine

Participants

Reaction Steps

4-Ethoxy-2-pyrrolidin-1-ylpyrimidine (2.0 g, 10 mol) was added to 15 mL of POCl3, followed by the addition of 0.5 ml of DMF. The reaction mixture was irradiated under microwave at 160° C. for 1.5 h. Most of the solvent was evaporated in vacuo. The residue was added in portions to ice-water containing ammonia. The precipitate was filtered off. The aqueous filtrate was extracted with EtOAc. The organic phase was dried over sodium sulfate, filtered, and concentrated. The solid precipitate was combined with the crude residue and purified by silica gel column chromatography to afford the title compound.

Provenance & Evidence