Novel Reversed Chain Modified Oligopeptides via Sequential α-<i>N</i>-Mitsunobu Condensation of a Functionalized C-glycoside
作者:John J. Turner、Friso D. Sikkema、Kees Erkelens、Gijs A. van der Marel、Herman S. Overkleeft、Jacques H. van Boom、Mark Overhand
DOI:10.1246/cl.2004.468
日期:2004.4
The synthesis of a novel reversed chain modified oligopeptide via sequential α-N-Mitsunobu condensation reactions on a C-glycoside with amino acid derived nitrobenzenesulfonamides is described. Str...
Synthesis of bridged sugar amino acids: a new entry into conformationally locked δ- and ε-amino acids
作者:Renate M van Well、Marlies E.A Meijer、Herman S Overkleeft、Jacques H van Boom、Gijsbert A van der Marel、Mark Overhand
DOI:10.1016/s0040-4020(03)00288-6
日期:2003.3
The synthesis of three methylene bridged sugar amino acids is described. Key transformations in the synthetic strategy are a CO-insertion on fully protected ribose, an aldolcondensation with formaldehyde and an oxetane forming cyclisation step. A novel Leu-enkephalin analogue containing the δ-SAA 1 was prepared using standard solution phase peptide chemistry.
Synthesis and Binding Affinity of Homologated Adenosine Analogues as A<sub>3</sub>Adenosine Receptor Ligands
作者:Hyuk-Woo Lee、Won-Jun Choi、Kenneth A. Jacobson、Lak-Shin Jeong
DOI:10.5012/bkcs.2011.32.5.1620
日期:2011.5.20
Homologated analogues 3a and 3b of potent and selective A3 adenosine receptor ligands, IB-MECA and dimethyl-IB-MECA were synthesized from commercially available 1-O-acetyl-2,3,5-tri-O-benzoyl-$\beta}$-D-ribofuranose (4) via $Co_2(CO)_8$-catalyzed siloxymethylation as a key step. Unfortunately, homologated analogues 3a and 3b did not show significant binding affinities at three subtypes of adenosine receptors, indicating that free rotation, resulting from homologation, induced unfavorable interactions in the binding site of the receptor maybe due to the presence of many conformations.