Phenyl isocyanate → HCID 54382464, compound

Participants

Reaction Steps

A solution of phenylisocyanate (0.93 ml) in benzene (5 ml) was added to a mixture of 1-tert-butyldimethylsilyl-4(S)-ethynyl-2-azetidinone (1.0 g) in benzene (10 ml), nitroethane (0.35 ml), and triethylamine (0.1 ml) in benzene (5 ml) at room temperature. The reaction mixture was refluxed for 8 hours, then evaporated in vacuo. The residue was purified by column chromatography on silica gel eluting with n-hexane-ethyl acetate (9:1) to give 1-tert-butyldimethylsilyl-4(S)-(3-methyl-5-isoxazolyl)-2-azetidinone (0.96 g) as a colorless oil.

Provenance & Evidence