Homocamptothecin (hCPT) is a camptothecin (CPT) derivative with a seven‐membered β‐hydroxylactone E ring, which shows higher lactone stability and improves topoisomeraseI (Topo I) inhibition activity. In an attempt to improve the antitumor activity of homocamptothecins, a series of 7‐alkenyl‐homocamptothecin derivatives was designed and synthesized based on a semisynthetic route starting from CPT
HomocamPTothecin (hCPT) 是一种喜树碱 (CPT) 衍生物,具有七元 β-羟基内酯 E 环,具有更高的内酯稳定性并提高拓扑异构酶 I (Topo I) 抑制活性。为了提高高喜树碱的抗肿瘤活性,基于以CPT为原料的半合成路线,设计并合成了一系列7-烯基-高喜树碱衍生物。大多数合成的化合物对 A-549 肿瘤细胞系的细胞毒活性高于拓扑替康 (TPT)。一些化合物如 2a 和 2o 显示出广泛的体外抗肿瘤谱,并表现出优异的 Topo I 抑制活性。
Synthesis of phenylalkyl-substituted polyhydroxypiperidines as potent inhibitors for α-l-fucosidase
Synthesis and inhibitory activities against alpha-L-fucosidase of phenylalkyl-substituted polyhydroxy piperidines have been described. Among the newly synthesized compounds, 2,4,6-trichloro derivative (16q) showed very high inhibitory activity against alpha-L-fucosidase with IC50 value of 0.005 mu M, and K-i values of 0.0011 mu M, respectively. (C) 2013 Elsevier Ltd. All rights reserved.