A. Krief et J. Bousbaa, OMEGA-ALKENYL-ALPHA-METHOXY-BENZYLLITHIUMS - ORIGINAL SYNTHESIS AND REACTIVITY, Tetrahedron letters, 38(35), 1997, pp. 6291-6294
1-Methoxy-benzyllithiums bearing suitably positioned C,C double bonds
possess a high propensity to produce a five or a six membered cycle by
carbocyclisation reaction. The reaction proceeds completely stereosel
ectively and produces a five membered cycle possessing the cis-stereoc
hemistry between the methoxy and the adjacent methyl group. (C) 1997 P
ublished by Elsevier Science Ltd.