2-Bromoethanol → HCID 67250612, compound

Participants

Reaction Steps

To 5.0 mL of THF, 5-(2-methylthio-4-propylaminopyrimidin-5-yl)-3H-[1,3,4]oxadiazol-2-one (200 mg) obtained in Step 1 of Example 17 was dissolved, then triphenylphosphine (588 mg), DEAD (40% toluene solution, 1.02 mL, 2.34 mmol) and 2-bromoethanol (280 mg) were added thereto, followed by stirring at room temperature for 1 hour. After completion of the reaction was confirmed by thin-layer chromatography, the reaction mixture was added with water and was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and then the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (chloroform/methanol) to give 3-bromoethyl-5-(2-methylthio-4-propylaminopyrimidin-5-yl)-3H-[1,3,4]oxadiazol-2-one [Compound (P) in which R1 represents n-propylamino, R8A represents 2-bromoethyl] (210 mg, yield 75%).

Provenance & Evidence