Multidimensional optimization of promising antitumor xanthone derivatives
摘要:
A promising antitumor xanthone derivative was optimized following a multidimensional approach that involved the synthesis of 17 analogues, the study of their lipophilicity and solubility, and the evaluation of their growth inhibitory activity on four human tumor cell lines. A new synthetic route for the hit xanthone derivative was also developed and applied for the synthesis of its analogues. Among the used cell lines, the HL-60 showed to be in general more sensitive to the compounds tested, with the most potent compound having a GI(50) of 5.1 mu M, lower than the hit compound. Lipophilicity was evaluated by the partition coefficient (K-p) of a solute between buffer and two membrane models, namely liposomes and micelles. The compounds showed a log K-p between 3 and 5 and the two membrane models showed a good correlation (r(2) = 0.916) between each other. Studies concerning relationship between solubility and structure were developed for the hit compound and 5 of its analogues. (C) 2013 Elsevier Ltd. All rights reserved.
The enolates, generated from phenacyl bromides by sodium telluride, yield 2,4-diarylfurans in addition to the expected dehalogenation products. No 1,4-dicarbonyl compounds could be isolated even in the presence of excess oxidizing agent, copper(II) chloride. Condensation of 2-(methoxymethoxy)arenecarbaldehydes with ethyl bromoacetate in the presence of sodium telluride gave the expected α,β-unsaturated
Pd(0)-Catalyzed Direct C−H Functionalization of 2-<i>H</i>-4-Benzylidene Imidazolones: Friendly and Large-Scale Access to GFP and Kaede Protein Fluorophores
The first one‐potsynthesis of N‐substituted2‐H‐4‐benzylidene imidazolones and their subsequent palladium‐catalyzed and copper‐assisted direct C2−H arylation and alkenylation with aryl‐ and alkenylhalides are described. This innovative synthesis is step‐economical, azide‐free, high yielding, highly flexible in the introduction of a variety of electronically different groups, and can be operated on
描述了N-取代的2 H -4亚苄基咪唑酮的首次单锅合成及其随后的钯催化和铜辅助的直接C2-H芳基化和芳基和烯基卤化物的烯基化反应。这种创新的合成方法经济,省力,无叠氮化物,高收率,在引入各种电子形式不同的基团时具有高度的灵活性,并且可以大规模操作。此外,该方法允许直接访问基于C2芳基化或烯基化的咪唑酮绿色荧光蛋白(GFP)和Kaede蛋白荧光团,包括邻羟基化模型。
NOVEL CURCUMIN DERIVATIVE
申请人:Takahashi Takashi
公开号:US20100048901A1
公开(公告)日:2010-02-25
The present invention provides a novel compound that is structurally similar to curcumin and has a suppressive effect on Aβ aggregation, a degradative effect on Aβ aggregates, an inhibitory effect on β-secretase, and a protective effect on neurons. The novel compound is a compound represented by the following general formula (Ia) or a salt thereof:
wherein R
1
represents a 4-hydroxy-3-methoxyphenyl group or the like, and R
2
represents a 1H-indol-6-yl group or the like.
The present invention provides a novel compound that is structurally similar to curcumin and has a suppressive effect on Aβ aggregation, a degradative effect on Aβ aggregates, an inhibitory effect on β-secretase, and a protective effect on neurons. The novel compound is a compound represented by the following general formula (Ia) or a salt thereof:
wherein R1 represents a 4-hydroxy-3-methoxyphenyl group or the like, and R2 represents a 1H-indol-6-yl group or the like.