Stereoselective Fluorination Alters the Geometry of a Cyclic Peptide: Exploration of Backbone-Fluorinated Analogues of Unguisin A
作者:Xiang-Guo Hu、Donald S. Thomas、Renate Griffith、Luke Hunter
DOI:10.1002/anie.201403071
日期:2014.6.10
enhancing the efficiency of peptide cyclization, and for fine‐tuning the conformations of cyclicpeptides, are valuable from a drug development perspective. Herein stereoselectivefluorination is investigated as a new strategy for achieving these goals. Four vicinal difluorinated analogues of the natural cyclic heptapeptide unguisin A have been efficiently synthesized. The analogues are found to adopt dramatically
The enantiomers of syn-2,3-difluoro-4-aminobutyric acid elicit opposite responses at the GABA<sub>C</sub>receptor
作者:Izumi Yamamoto、Meredith J. T. Jordan、Navnath Gavande、Munikumar R. Doddareddy、Mary Chebib、Luke Hunter
DOI:10.1039/c1cc15816c
日期:——
The conformational behaviour and GABA receptor activity of the different stereoisomers of 2,3-difluoro-4-aminobutyric acid are described. Two enantiomeric GABAC-active ligands are identified, one of which is an agonist while the other is an antagonist. The results support an existing QSAR model of the bioactive geometry of GABA at GABAC.