Angewandte Chemie - International Edition p. 3281 - 3285 (2003)
Update date:2022-08-05
Topics:
Kilbinger, Andreas F. M.
Cantrill, Stuart J.
Waltman, Andrew W.
Day, Michael W.
Grubbs, Robert H.
Trick or treat? Ruthenium alkylidene catalyzed ring-closing metathesis of crown ether like diene substrates around a dumbbell-shaped secondary ammonium ion affords [2]rotaxanes. The reversible nature of this process has been demonstrated through a magic ring synthesis, wherein the preformed olefinic macrocycle and dumbbell-shaped component equilibrate to form the hydrogen-bond-stabilized [2]rotaxane in the presence of a metathesis catalyst (see scheme).
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