First examples of 2,6-diarylnicotinaldehydes prepared under conventional and microwave conditions
摘要:
Enaminoketones undergo unexpected self condensation in acetic acid to produce a wide range of 2,3,6-trisubstituted pyridine derivatives in excellent yields in the presence of NH4OAc. This is the first Letter on the synthesis of 2,6-diarylnicotinaldehydes. The reaction was studied under microwave irradiation and conventional heating. However, mixed condensations were observed when two different enaminones are combined. (C) 2015 Published by Elsevier Ltd.
[EN] BENZOFURAN-4,5-DIONES AS SELECTIVE PEPTIDE DEFORMYLASE INHIBITORS<br/>[FR] BENZOFURANE-4-5-DIONES CONSTITUANT DES INHIBITEURS SÉLECTIFS DE LA DÉFORMYLASE DE PEPTIDE
申请人:SLOAN KETTERING INST CANCER
公开号:WO2010129049A1
公开(公告)日:2010-11-11
The instant invention provides novel benzofuran-4,5-diones and pharmaceutical compositions thereof useful for inhibiting PDF and for treating proliferative and infectious diseases. Compounds may be selective for eukaryotic (e.g., human) PDF or prokaryotic PDF.
Discovery of highly potent tubulin polymerization inhibitors: Design, synthesis, and structure-activity relationships of novel 2,7-diaryl-[1,2,4]triazolo[1,5-a]pyrimidines
effectively inhibited tubulinpolymerization and was 3-fold more powerful than positive control CA-4. Moreover, molecular docking analysis indicated that 5e overlapped well with CA-4 in the colchicine-binding site. These studies demonstrated that 2,7-diaryl-[1,2,4]triazolo[1,5-a]pyrimidine skeleton might be used as the leading unit to develop novel tubulinpolymerizationinhibitors as potential anticancer
通过去除我们之前报道的化合物3 中的5-甲基和 6-乙酰基,我们设计了一系列新型 2,7-二芳基-[1,2,4] 三唑并 [1,5- a ] 嘧啶衍生物作为潜在的微管蛋白聚合抑制剂。其中,化合物5e对 HeLa 细胞显示出低纳摩尔的抗增殖功效,比铅类似物3高 166 倍。有趣的是,与 HEK-293(正常人胚胎肾细胞)相比,5e在抑制癌细胞方面表现出显着的选择性。此外,5e通过改变 p-cdc2 和细胞周期蛋白 B1 的表达水平,剂量依赖性地将 HeLa 阻滞在 G2/M 期,并通过调节裂解的 PARP 的表达导致 HeLa 细胞凋亡。进一步的证据表明,5e有效地抑制了微管蛋白聚合,并且比阳性对照 CA-4 强 3 倍。此外,分子对接分析表明,5e与秋水仙碱结合位点中的 CA-4 重叠良好。这些研究表明,2,7-二芳基-[1,2,4]三唑并[1,5- a ]嘧啶骨架可用作开发新型微管蛋白聚合抑制剂作为潜在抗癌剂的主要单元。
.alpha.,.beta.-Unsaturated ketones and aldehydes and method of
申请人:Eli Lilly and Company
公开号:US04175087A1
公开(公告)日:1979-11-20
.alpha.,.beta.-Unsaturated ketones and aldehydes, together with a method of preparation thereof which comprises reacting aldehydes and cyclic and acyclic ketones possessing a methyl or methylene group .alpha.- to the carbonyl function with N,N-dialkylformamide dialkyl acetal to yield the corresponding enaminoketones and enaminoaldehydes, which enaminoketones and enaminoaldehydes are allowed to react with alkyllithium reagents to yield the corresponding nitrogen-free 2-alkylidene ketones and 2-alkylidene aldehydes.
intermediates for the preparation of novel functional fluorophores with yields up to 98%. The structures of the products obtained and regioselectivity of the reactions were determined on the basis of NMR measurements and X-ray diffraction analysis. Since pyrazolo[1,5-a]pyrimidines (PPs) 3 have shown an important fluorescence, photophysical properties of four 2-methylderivatives substituted at position 7 with different
提供了通过微波辅助方法以高收率区域选择性合成3-甲酰基吡唑并[1,5- a ]嘧啶4a - k的一锅法。合成过程通过β-烯酮1与NH -3-氨基吡唑2之间的环缩合反应进行,然后与亚胺盐部分进行甲酰化(Vilsmeyer–Haack试剂)。这些N-杂芳基醛4已成功地用作制备新型功能性荧光团的战略中间体,产率高达98%。基于NMR测量和X射线衍射分析,确定所得产物的结构和反应的区域选择性。由于吡唑并[1,5- a ]嘧啶(PPs)3已显示出重要的荧光,因此研究了在7位被不同的受体(A)或供体(D)组取代的四种2-甲基衍生物的光物理性质。所评估的化合物在不同溶剂中表现出较大的斯托克斯位移,但仅取代的p-甲氧基苯基(4-An)具有较强的荧光强度,其ICT更高,量子产率高达44%。因此,基于吡唑并[1,5- a ]嘧啶的杂交系统可以用作荧光探针,以检测与生物或环境有关的物种。
Sulfonamide/sulfamate switch with a series of piperazinylureido derivatives: Synthesis, kinetic and in silico evaluation as carbonic anhydrase isoforms I, II, IV, and IX inhibitors
作者:Alessio Nocentini、Davide Moi、Alessandro Deplano、Sameh M. Osman、Zeid A. AlOthman、Gianfranco Balboni、Claudiu T. Supuran、Valentina Onnis
DOI:10.1016/j.ejmech.2019.111896
日期:2020.1
anti-cancer zinc-binder CAIs such as SLC-0111 and S4 was carried out by including the urea outer nitrogen atom into a substituted piperazine ring reducing the linker flexibility. The derivatives were assessed for the inhibition of CA I, II and IV (off-target isoforms) and the tumor-associated CA IX (anticancer drug target). CA I and IV were not effectively inhibited, whereas many low nanomolar inhibitors were