Template Synthesis of [2]Rotaxanes with Large Ring Components and Tris(biphenyl)methyl Group as the Blocking Group. The Relationship between the Ring Size and the Stability of the Rotaxanes
作者:Shinichi Saito、Kazuko Nakazono、Eiko Takahashi
DOI:10.1021/jo060829h
日期:2006.9.1
phenanthrolines 3a−e and a tris(biphenyl)methyl derivative 4. [2]Rotaxanes with large ring components (10a,b) were synthesized by the template method, and the stability of the rotaxanes was examined. The study revealed that the tris(biphenyl)methyl group is an effective blockinggroup for the rotaxanes with up to a 33-membered ring. Even a rotaxane with a 37-membered macrocyclic phenanthroline (10b) could
Synthesis of [2]Rotaxanes by the Catalytic Reactions of a Macrocyclic Copper Complex
作者:Shinichi Saito、Eiko Takahashi、Kazuko Nakazono
DOI:10.1021/ol062247s
日期:2006.10.1
We synthesized [2]rotaxanes by the reactions catalyzed by a macrocyclic Cu(I)-phenanthroline complex. The catalytic site was located inside the ring component so that the rotaxane could be selectively formed. A C-S bond-forming reaction and oxidative dimerization of alkyne was utilized for the efficient synthesis of a new series of [2]rotaxanes. [reaction: see text]