Reaction of the chiral iminium salt 3 with stabilised carbanions gives the compounds 4-9 containing a highly polarised double bond. The extent of this polarisation is determined by variable temperature1H NMR studies, comparison of13C NMR chemical shifts and an X-ray structure determination. © 2000 Elsevier Science Ltd.
Aitken, A. A., Ali, K., De Elena, N., & Lightfoot, P. (2000). Synthesis and structure of highly polarised double-bond compounds derived from S-proline. Tetrahedron Letters, 41(41), 7965–7968. https://doi.org/10.1016/S0040-4039(00)01372-1