作者:Victor Blanco、Armando Carlone、Kevin D. Hänni、David A. Leigh、Bartosz Lewandowski
DOI:10.1002/anie.201201364
日期:2012.5.21
Switch it on! The activity of an organocatalytic group incorporated within a rotaxane architecture can be controlled by switching the position of the macrocycle. The system was used to mediate the progress of the Michael addition of an aliphatic thiol to trans‐cinnamaldehyde.
Multivalent Molecular Shuttles - Effect of Increasing the Number of Centers in Switchable Catalysts
作者:Celedonio M. Álvarez、Héctor Barbero、Daniel Miguel
DOI:10.1002/ejoc.201500942
日期:2015.10
Three molecularshuttles based upon ammonium/triazolinium salt motifs with one, two, and three catalytic centers are prepared. Their organocatalysis of two Michale‐type reactions shows that the catalysis process occurs if the amine is exposed, but this catalysis stops if the ammonium salt is covered by the crown ether.