Fujita et al., 1994

Fujita et al.Nature, 1994

molecular "magic rings"

Fujita et al.

The stoichiometry will induce the right

selection of the fragments so as to afford a catenane

quantitatively

Fujita et al.

The complexes contain two identical ligands but each ligand is asymmetric: the ring is oriented

a catenane with two oriented rings

Is it a chiral compound?

a catenane with two 36-membered rings

quantitative formation of [2]catenanes using copper(I) and palladium(II) as templating and assembling centers:

the entwining route and the threading approach

Christiane Dietrich-Buchecker, Benoît Colasson, Makoto Fujita, Akiko Hori, Neri Geum, Shigeru Sakamoto, Kentaro

Yamaguchi

the entwining approach

synthesis of the unsubstituted ligand via Stille cross-coupling reaction

use of Suzuki-Miyaura cross-coupling reactions

2

synthesis of a [2]catenane by entwining (CuI) and clipping (PdII)

both reaction are virtually quantitativethermodynamic control