Chlorine → HCID 20336569, compound

Participants

Reaction Steps

Methyl 4-(4-methylthio-2-oxoazetidin-1-yl)-2-methyl-3-oxobutyrate (280 mg, 1.14 mmole) was dissolved in dry carbon tetrachloride (15 ml) and to the stirred ice-cooled solution chlorine (80 mg, 1.13 mmole) in carbon tetrachloride (3.2 ml) was added in one portion. After addition of the chlorine, the cooling bath was removed and stirring was continued for 3 minutes. The solvent was evaporated under reduced pressure to yield methyl 4-(4-chloro-2-oxoazetidin-1-yl)-2-methyl-3-oxobutyrate as a pale yellow gum (275 mg). νmax (CHCl3): 1780 (β-lactam C=O), 1755 (ester C=O), 1725 (ketone C=O) cm-1.

Provenance & Evidence