Synthesis of 4-amino-4,5-dideoxy-l-lyxofuranose derivatives and their evaluation as fucosidase inhibitors
作者:Carine Chevrier、Didier Le Nouën、Albert Defoin、Céline Tarnus
DOI:10.1016/j.carres.2011.03.030
日期:2011.7
The nitrone 4 (4,5-dideoxy-4-hydroxylamino-3,4-O-isopropylidene-L-lyxofuranose) was synthesised from D-ribose and used as key intermediate for the preparation of fucosidase inhibitors. We describe two transformations of 4. Hydrolysis with aqueous sulfur dioxide gave the known potent nanomolar inhibitor 4-amino-4,5-dideoxy-L-lyxofuranose (3). 1,3-Dipolar cycloaddition with enol ethers led to the related
从D-核糖合成了4(4-,5-二脱氧-4-羟基氨基-3,4-O-异亚丙基-L-呋喃呋喃糖)硝酮4,并将其用作制备岩藻糖苷酶抑制剂的关键中间体。我们描述了4的两种转化。用二氧化硫水溶液水解得到已知的有效纳摩尔抑制剂4-氨基-4,5-二脱氧-L-呋喃呋喃糖(3)。用烯醇醚进行的1,3-偶极环加成反应产生了相关的1,2,5,6-四脱氧-2,5-亚氨基-L-高庚糖酸酯2a,酸2b和相应的庚醇2c。已经评估了新的亚氨基糖对牛肾中α-L-岩藻糖苷酶的抑制活性。事实证明,醇2c在与氨基糖3相同的范围内是一种有效的抑制剂(K(i)= 8对10nM)。