Small-molecule recognition for controlling molecular motion in hydrogen-bond-assembled rotaxanes.

Authors :: Martinez-Cuezva A
Berna J
Orenes RA
Pastor A
Alajarin M
Source :: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2014 Jun 23; Vol. 53 (26), pp. 6762-7. Date of Electronic Publication: 2014 May 20.
Publication Year :: 2014
Abstract: Di(acylamino)pyridines successfully template the formation of hydrogen-bonded rotaxanes through five-component clipping reactions. A solid-state study showed the participation of the pyridine nitrogen atom in the stabilization of the mechanical bond between the thread and the benzylic amide macrocycle. The addition of external complementary binders to a series of interlocked bis(2,6-di(acylamino)pyridines) promoted restraint of the back and forward ring motion. The original translation can be restored through a competitive recognition event by the addition of a preorganized bis(di(acylamino)pyridine) that forms stronger ADA-DAD complexes with the external binders.<br /> (© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

Subjects :: Binding Sites
Crystallography, X-Ray
Hydrogen Bonding
Molecular Conformation
Pyridines chemistry
Rotaxanes chemistry

Full Text Access

Tools