Synthesis of [<i>n</i>]- and [<i>n</i>.<i>n</i>]Cyclophanes by Using Suzuki−Miyaura Coupling
作者:Beverly B. Smith、Darron E. Hill、T. Ashton Cropp、Rosa D. Walsh、David Cartrette、Sherry Hipps、Amy M. Shachter、William T. Pennington、William R. Kwochka
DOI:10.1021/jo025509m
日期:2002.7.1
Reaction of the bis-9-BBN adduct of several dienes with 1,3-dibromobenzene via Suzuki coupling leads to a series of [n]metacyclophanes ranging in size from 10 to 17 atom members. In each case, two carbon-carbon bonds are formed in one reaction vessel. However, when the bis-9-BBN adduct of 1,5-hexadiene is coupled with a variety of aryl dihalides, larger [n.n]cyclophanes were formed in preference to the [n]cyclophanes. Four carbon-carbon bonds are formed in this instance. Single-crystal X-ray analyses of these [n.n]cyclophanes reveal interestingly shaped molecules with large cavities.