On catalysis by trimethylsilyl trifluoromethane-sulphonate, 4-acetoxy-1-trimethylsilylazetidin-2-one reacted with the enol silanes [R1CH![[double bond, length half m-dash]](https://www.rsc.org/images/entities/char_e006.gif)
C(OSiMe3)R2] to give the β-lactams [[graphic omitted]HCH(R1)COR2] in excellent yields (71 to 95%).
A. G. M. Barrett and P. Quayle, J. Chem. Soc., Chem. Commun., 1981, 1076 DOI: 10.1039/C39810001076
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