Lithium iodide → HCID 67954680, compound

Participants

Reaction Conditions

Reaction Steps

A suspension of ethyl 1,6-dihydro-6-oxo-1-phenyl-2-(3-pyridinyl)-5-pyrimidinecarboxylate (i.e. the product from Example 7, Step B) (5.0 g, 15.5 mmol) and lithium iodide (powder, 5.2 g, 38.8 mmol) in pyridine (15 mL) was heated to 125-130° C. for 12 h. After cooling to ambient temperature, excess solvent was removed under reduced pressure. The resulting residue was dissolved in water (100 mL) and acidified with hydrochloric acid (6 N) to pH 7. The resulting dark brown solution was extracted with ethyl acetate (1×100 mL) to remove the non polar impurities. The aqueous layer was again extracted with dichloromethane/methanol (95:5) (2×50 mL). After initial extractions, the aqueous layer was slowly acidified to pH 4 and further extracted with dichloromethane/methanol (95:5) (3×50 mL). The combined neutral and acidic extracts were washed with brine and dried over anhydrous Na2SO4. The residue obtained after removal of the solvent was dried under high-vacuum to obtain 3.4 g of the title compound as a light brown solid.

Provenance & Evidence