Ad. Campbell et al., The total synthesis of (-)-alpha-kainic acid using titanium-mediated dienemetallabicyclisation methodology, CHEM COMMUN, (3), 1999, pp. 245-246
Titanium-mediated diene metallabicyclisation-elimination-functionalisation
has been utilised for the preparation of syn-3,4-disubstituted and syn,syn-
2,3,4-trisubstituted pyrrolidines in high yield and excellent stereoselecti
vity; this methodology has been employed in a total synthesis of (-)-alpha-
kainic acid starting from L-serine.