Imidazole → HCID 68825044, compound

Participants

Reaction Steps

Imidazole (0.15 g) and 0.36 ml of triethylsilylchloride were added to a solution of 0.32 g of (3S,4R)-3-[(1R)-1-hydroxyethyl]-4-[(1R)-1-methyl-2-[7-(pyridin-3-yl)carbonyl imidazo[5,1-b]thiazol-2-yl]-2-oxoethyl]azetidin-2-one in 3.2 ml of dimethylformamide under ice cooling, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was diluted with 80 ml of ethyl acetate, and the diluted reaction mixture was washed three times with 20 ml of a 10% aqueous sodium chloride solution and was then washed with an a saturated aqueous sodium chloride solution and was dried over anhydrous magnesium sulfate. The solvent was removed by evaporation, the resultant solid was suspended in 4 ml of a hexane:ethyl acetate=1:1 solution and was collected by filtration to give 0.33 g of (3S,4R)-3-[(1R)-1-(triethylsilyloxy)ethyl]-4-[(1R)-1-methyl-2-[7-(pyridin-3-yl)carbonylimidazo[5,1-b]thiazol-2-yl]-2-oxoethyl]azetidin-2-one.

Provenance & Evidence