A rapid and efficient synthesis of the extended bipyridinium-based class of cyclophanes - that is, ExnBox4+ (n = 0-3), where n is the number of p-phenylene rings inserted between the pyridinium rings - is demonstrated, resulting in much higher yields of products along with a reduced output of oligomeric byproducts. Although each cyclophane can be synthesized readily without the use of a precise stoichiometric amount of template, ExBox4+ can be prepared in 66% yield (following crystallization) using six equivalents of pyrene in a template-directed protocol. This new methodology has been employed to synthesize, in modest yield, a nearly 2.5 nm long cyclophane consisting of 12 aromatic rings.
ASJC Scopus subject areas
- Organic Chemistry
FingerprintDive into the research topics of 'Synthesis of ExnBox cyclophanes'. Together they form a unique fingerprint.
Barnes, J. C. (Creator), Juríček, M. (Contributor), Vermeulen, N. A. (Creator), Dale, E. J. (Creator) & Stoddart, J. F. (Creator), Cambridge Crystallographic Data Centre, 2013