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.
通过
$Co2(CO)_8<$/TEX>催化硅氧甲基化作为关键步骤,从市售的1-O-乙酰基-2,3,5-三-O-苯甲酰基-$\beta}$-D-呋喃核糖(4)合成了强效和选择性A3腺苷受体配体IB-MECA和二甲基-IB-MECA的同源类似物3a和3b。遗憾的是,同源类似物 3a 和 3b 在三种亚型腺苷受体上没有显示出明显的结合亲和力,这表明同源化产生的自由旋转可能会由于多种构象的存在而在受体结合部位引起不利的相互作用。