Facile access to monodisperse ultralarge rings.
A facile access to monodisperse ultralarge rings counting 126, 174, and 294 ring atoms is described. It follows a reaction sequence that is well suited for the preparation of [2]catenanes but altered just in the sequence of the two steps cyclization and carbonate formation. The carbonate acts as a covalent template that is easily formed and later cleaved. The obtained monocyclic products are constitutional isomers of the catenanes.
Max-Planck-Institut für Polymerforschung, Ackermannweg 10, D-55128 Mainz, Germany.
Muhammad Raza
MR
Shah
Stefan
S
Duda
Beate
B
Müller
Adelheid
A
Godt
Abdul
A
Malik