Analogues of deltorphin I containing conformationally restricted amino acids in position 2: structure and opioid activity
作者:Anika Lasota、Oliwia Frączak、Anna Leśniak、Adriana Muchowska、Andrzej W. Lipkowski、Michał Nowakowski、Andrzej Ejchart、Aleksandra Olma
DOI:10.1002/psc.2738
日期:2015.2
New analogues of deltorphinI (DT I, Tyr‐d‐Ala‐Phe‐Asp‐Val‐Val‐Gly‐NH2), with the d‐Ala residue in position2 replaced by α‐methyl‐β‐azido(amino, 1‐pyrrolidinyl, 1‐piperidinyl or 4‐morpholinyl)alanine, were synthesized by a combination of solid‐phase and solution methods. All ten new analogues were tested for receptor affinity and selectivity to μ‐ and δ‐opioid receptors. The affinity of analogues containing
An efficient synthesis of optically pure α-alkyl-β-azido- and α-alkyl-β-aminoalanines via ring opening of 3-amino-3-alkyl-2-oxetanones
作者:Adam Kudaj、Aleksandra Olma
DOI:10.1016/j.tetlet.2007.07.078
日期:2007.9
N-Boc-α-alkylserine β-lactones on ring opening with sodium azide provide N-Boc-α-alkyl-β-azidoalanines, as N-protected amino acids are suitable for direct incorporation into peptides. N-Boc-α-alkyl-β-azidoalanines can be transformed by catalytic hydrogenation into the corresponding N-Boc-α-alkyl-β-aminoalanines.
The impact of β-azido(or 1-piperidinyl)methylamino acids in position 2 or 3 on biological activity and conformation of dermorphin analogues
作者:Maciej Maciejczyk、Anika Lasota、Oliwia Frączak、Piotr Kosson、Aleksandra Misicka、Michał Nowakowski、Andrzej Ejchart、Aleksandra Olma
DOI:10.1002/psc.2903
日期:2016.8
analogue in this series, Tyr‐(R)‐Ala‐(R)‐α‐benzyl‐β‐azidoAla‐Gly‐Tyr‐Pro‐Ser‐NH2 and its epimer were analysed by 1H and 13C NMR spectroscopy and restrained molecular dynamics simulations. The dominant conformation of the investigated peptides depended on the absolute configuration around Cα in the α‐benzyl‐β‐azidoAla residue in position 3. The (R) configuration led to the formation of a type I β‐turn, whilst