Medium-sized cyclophanes — Part 85: Benzylation by 8-(bromomethyl)[2.2]metacyclophanes. Through-space electronic interactions of [2.2]metacyclophane benzyl cations
TiCl4-mediated Friedel–Crafts benzylation of benzene with 8-(bromomethyl)[2.2]metacyclophanes to afford 8-benzyl[2.2]metacyclophanes is described. Substituent effect through space on the rate of th...
A convenient preparation of 8-(tolylmethyl)[2.2]metacyclophanes and 8,8′-(ethane-1,2-diyl)bis(16-methoxy[2.2]meta-cyclophane) using a cross-coupling reaction of 8-bromomethyl[2.2]metacyclophanes with tolylmagnesium bromides is described. The structures of these novel [2.2]metacyclophanes in solution are also discussed.