S. Hanessian et al., TOTAL SYNTHESIS OF (-POLYOXIMIC ACID - CIS-3-ETHYLIDENE-L-AZETIDINE-2-CARBOXYLIC ACID()), Tetrahedron letters, 34(26), 1993, pp. 4157-4160
The stereocontrolled total synthesis of (natural) cis- and (unnatural)
trans-polyoximic acids is described starting with D-serine as a chira
l template.