O-Benzylation of trihydroxy[3.3.3]metacyclophane with 3,5-bis(bromomethyl)toluene in the presence of Cs2CO3 affords a doubly-bridged macrocycle in 45% yield, in which structural characterization is also discussed.
T. Yamato and F. Zhang, J. Chem. Res. (S), 1999, 34 DOI: 10.1039/A803386B
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