Lithium iodide → 1,6-Dihydro-1-(2-methoxyethyl)-6-oxo-2-(3-thienyl)-5-pyrimidinecarboxylic acid

Participants

Reaction Steps

Ethyl 1,6-dihydro-1-(2-methoxyethyl)-6-oxo-2-(3-thienyl)-5-pyrimidinecarboxylate a (1.82 g, 5.90 mmol) (i.e. the product from Example 10, Step B) was dissolved in ethyl acetate and treated with lithium iodide (powder, 2.36 g, 17.6 mmol) and heated to reflux for 16 h. The crude reaction mixture was concentrated under reduced pressure and then aqueous sodium bicarbonate solution was added and the resulting solution was extracted with ethyl acetate which was then discarded. The aqueous layer was made acidic with hydrochloric acid (1 N) and then extracted with dichloromethane (2×40 mL). The combined organics were dried over MgSO4 and concentrated under reduced pressure to provide the title compound as a solid.

Provenance & Evidence