Selective preparation. 30. A convenient preparation of 5,13-di-tert-butyl-8,16-disubstituted-[2.2]metacyclophanes and their trans-tert-butylation and halogenation reactions
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.