The oxazoline-azetidinone (2) reacts with alkanethiols in the presence of toluene-p-sulphonic acid to give mixtures of (3R,4R)-[e.g.(4a)] and (3R,4S)-[e.g.(5a)] 4-alkylthio-1-(2-methylpropenyl)-3-phenylacetami-doazetidin-2-ones.
D. F. Corbett and R. J. Stoodley, J. Chem. Soc., Chem. Commun., 1974, 438 DOI: 10.1039/C39740000438
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