Investigations of azapeptides as mimetics of Leu-enkephalin

Investigations of azapeptides as mimetics of Leu-enkephalin Design, synthesis, and binding characteristics of an opiate receptor mimetic peptide Replacement of the peptide-backbone amides connecting Tyr-Gly and Gly-Gly in leucine-enkephalin with ketomethylene groups: synthesis and biological activity Cyclic enkephalin analog containing .alpha.-amino-.beta.-mercapto-.beta.,.beta.-pentamethylenepropionic acid at position 2 or 5 Systematic replacement of amides by 1,4-disubstituted[1,2,3]triazoles in Leu-enkephalin and the impact on the delta opioid receptor activity Opioid activity of 4-imidazolidinone positional analogues of Leu-Enkephalin Enkephalin analogues with 2′,6′-dimethylphenylalanine replacing phenylalanine in position 4 Synthesis and Biological Activity of a Novel Methylamine-Bridged Enkephalin Analogue (MABE): A New Route to Cyclic Peptides and Peptidomimetics Synthesis and biological activity of pentapeptide analogs of the potent angiotensin converting enzyme inhibitor 5(S)-benzamido-4-oxo-6-phenylhexanoyl-L-proline Syntheses of potent Leu-enkephalin analogs possessing β-hydroxy-α,α-disubstituted-α-amino acid and their characterization to opioid receptors