Diisopropyl Ether → 4-Chloro-6-iodoquinazoline

Participants

Reaction Conditions

Reaction Steps

A mixture of 6-iodoquinazolin-4(3H)-one (Intermediate 11, 100 mg, 0.37 mmol) and phenylphosphonic dichloride (1.5 mL) was heated at 150° C. for one h. After cooling the reaction mixture in an ice bath, isopropyl ether was added. The resultant crystalline precipitate was collected by filtration, and was then stirred with saturated aqueous sodium bicarbonate solution. The solution was extracted with three portions of ethyl acetate, and the combined extracts were dried (magnesium sulfate) and concentrated under reduced pressure to give the crude product. Purification by preparative thin layer chromatography (silica gel, 5% and 10% ethyl acetate/hexanes) afforded the desired product. LC/MS 291 (M+1).

Provenance & Evidence