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Journal Article
Research Support, N.I.H., Extramural
Synthesis and Opioid Activity of Tyr 1 -ψ[(Z)CF=CH]-Gly 2 and Tyr 1 -ψ[(S)/(R)-CF 3 CH-NH]-Gly 2 Leu-enkephalin Fluorinated Peptidomimetics.
ChemMedChem 2017 April 21
We describe the design, synthesis, and opioid activity of fluoroalkene (Tyr1 -ψ[(Z)CF=CH]-Gly2 ) and trifluoroethylamine (Tyr1 -ψ[(S)/(R)-CF3 CH-NH]-Gly2 ) analogues of the endogenous opioid neuropeptide, Leu-enkephalin. The fluoroalkene peptidomimetic exhibited low nanomolar functional activity (5.0±2 nm and 60±15 nm for δ- and μ-opioid receptors, respectively) with a μ/δ-selectivity ratio that mimics that of the natural peptide. However, the trifluoroethylamine peptidomimetics, irrespective of stereochemistry, did not activate the opioid receptors, which suggest that bulky CF3 substituents are not tolerated at this position.
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