Synthesis and Biological Evaluation of Glycosidase Inhibitors: <i>g</i><i>em</i>-Difluoromethylenated Nojirimycin Analogues
作者:Ruo-Wen Wang、Xiao-Long Qiu、Mikael Bols、Fernando Ortega-Caballero、Feng-Ling Qing
DOI:10.1021/jm060066q
日期:2006.5.1
In our ongoing program aimed at the design, synthesis, and biological evaluation of novel gem-difluoromethylenated glycosidase inhibitors, gem-4,4-difluoromethylenated iminosugars (5-9) were synthesized. The biological evaluation of these synthetic iminosugars showed that the gem-difluoromethylenyl group generally reduced the inhibition of glycosidases. However, this was not the case at pH 5.0, where
在我们正在进行的旨在设计,合成和对新型宝石二氟甲基化糖苷酶抑制剂进行生物学评估的程序中,合成了gem-4,4-二氟甲基化亚氨基糖(5-9)。这些合成亚氨基糖的生物学评估表明,宝石-二氟亚甲基通常降低了糖苷酶的抑制作用。但是,在pH 5.0时不是这种情况,其中的宝石二氟甲基化亚氨基糖6是比同类亚氨基糖1和36更强的抑制剂,这表明该基团的影响主要是通过其对胺的作用。提出未质子化的亚氨基糖是优选与β-葡萄糖苷酶结合的物种,因为亚氨基糖6的pK(a)值低于1或36的pK(a)值,使亚氨基糖1和36在pH 5.0下大部分被质子化,而亚氨基糖6为不是。