(figure presented) Two ammonium ion/crown ether-based rotaxane monomers - each incorporating (i) a dumbbell-shaped component, possessing an exchangeable benzylic triphenylphosphonium stopper, and (ii) a ring component, bearing an aldehyde function - undergo a sequence of Wittig reactions in which the surrogate triphenylphosphonium stopper is exchanged for a ring component either (i) in the same rotaxane molecule to give cyclic daisy chains by an intramolecular, chain-terminating reaction or (ii) in another rotaxane molecule to give acyclic daisy chains by an intermolecular chain-propagating reaction.
|Original language||English (US)|
|Number of pages||4|
|State||Published - Mar 23 2000|
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry