Stereomeric Pyrrolidinopentoses Bearing an Imidazole Ring − Synthesis, Chiroptical Properties, and Evaluation as Potential Sugar-Mimic Glycosidase Inhibitors
作者:Théophile Tschamber、Hervé Siendt、Céline Tarnus、Dariusz Deredas、Andrzej Frankowski、Sylviane Kohler、Jacques Streith
DOI:10.1002/1099-0690(200202)2002:4<702::aid-ejoc702>3.0.co;2-y
日期:2002.2
C(4)-metallated imidazole derivatives to the appropriately configured and protected aldotetroses. Cyclisation of the resulting linear imidazolo-carbohydrates was performed by means of intramolecular Walden inversion processes, followed by deprotection to afford the five target imidazolo-sugars. Three of the four D-configured stereomers proved to be good to moderate glycosidase inhibitors, as determined
报道了咪唑并吡咯烷并戊糖 ent-2 (L-阿拉伯)、3 (D-木)、4 (D-lyxo)、ent-4 (L-lyxo) 和 5 (D-ribo) 的合成,完成所有八种可能的立体异构体的系列。相应的五个线性咪唑糖前体是通过将 C(4) 金属化咪唑衍生物亲核添加到适当配置和保护的 aldotetroses 中制备的。所得线性咪唑并糖的环化通过分子内瓦尔登反转过程进行,然后去保护以提供五种目标咪唑并糖。根据 Michaelis-Menten 动力学确定,四种 D 型立体异构体中的三种被证明是良好的至中度糖苷酶抑制剂。