Size-selective synthesis of [9]–[11] and [13]cycloparaphenylenes

Size-selective synthesis of [9]–[11] and [13]cycloparaphenylenes†
Yuuki Ishii, Yusuke Nakanishi, Haruka Omachi, Sanae Matsuura, Katsuma Matsui, Hisanori Shinohara,
Yasutomo Segawa and Kenichiro Itami* 

 This paper details size-specific CPP synthesis via introduction of rigid angled parts (cyclohexane rings).  The compounds were assembled using efficient palladium- catalysed C–B/C–Br cross-coupling (Suzuki–Miyaura coupling) and/or nickel-mediated C–Br/C–Br coupling reactions, and the final removal of the rigid angled parts was achieved by thermolysis in the presence of sodium bisulfate.

http://pubs.rsc.org/en/Content/ArticleLanding/2012/SC/c2sc20343j?utm_source=toc-alert&utm_medium=email&utm_campaign=pub-sc-vol-3-issue-7