C. Marchioro et al., SYNTHESIS AND NMR-STUDIES OF KEY INTERMEDIATES TO A NEW CLASS OF BETA-LACTAM - THE TRINEMS, Journal of the Chemical Society. Perkin transactions. I, (4), 1997, pp. 463-468
An efficient synthesis of the four isomeric epoxides 4a-d, key compoun
ds to the trinem ring system, starting from )-(+)-4-acetoxy-3-[1'-(ter
t-butyldimethylsilyloxy) ethyl]azetidin-2-one 6a is described. All the
intermediates have been characterized by means of NMR techniques.