l-DMDP, l-homoDMDP and their C-3 fluorinated derivatives: synthesis and glycosidase-inhibition
作者:Yi-Xian Li、Mu-Hua Huang、Yukiko Yamashita、Atsushi Kato、Yue-Mei Jia、Wu-Bao Wang、George W. J. Fleet、Robert J. Nash、Chu-Yi Yu
DOI:10.1039/c0ob01063d
日期:——
L-DMDP and L-homoDMDP, the enantiomers of naturally occurring DMDP and homoDMDP have been synthesized from D-xylose derived cyclic nitrone 9. Their 3-deoxy-3-fluorinated analogues were also obtained from polyhydroxylated fluorinated cyclic nitrone 10, which was prepared from fluorinated sugar 12 in seven steps. Bioactivities of these iminosugars against various glycosidases were evaluated. While L-DMDP and L-homoDMDP are potent inhibitors of α-glucosidases, a sharp decrease of inhibition was found when the C-3 hydroxyl group of these compounds was replaced by fluoride, which showed the great importance of the C-3 hydroxyl in their interaction with enzymes.
L-DMDP和L-homoDMDP是天然存在的DMDP和homoDMDP的对映体,已通过从D-木糖衍生的环状亚硝酮9合成。它们的3-去氧-3-氟化类似物也通过从氟化糖12经过七步反应制备的多羟基氟化环状亚硝酮10获得。这些亚氨糖对多种糖苷酶的生物活性进行了评估。虽然L-DMDP和L-homoDMDP是α-葡萄糖苷酶的强抑制剂,但当这些化合物的C-3羟基被氟替代时,抑制作用明显下降,这显示了C-3羟基在与酶相互作用中的重要性。