J. Clayden et K. Tchabanenko, Synthesis of (+/-)-kainic acid by dearomatising cyclisation of a lithiatedN-benzyl p-anisamide, CHEM COMMUN, (4), 2000, pp. 317-318
N-Benzyl p-anisamide 6, on lithiation with (BuLi)-Li-t in the presence of H
MPA, undergoes a stereoselective anionic cyclisation with loss of aromatici
ty to give a bicyclic enone which may be converted in nine steps to (+/-)-k
ainic acid.