A facile synthesis of α,α′-(EE)-bis(benzylidene)-cycloalkanones and their antitubercular evaluations
摘要:
An economical and facile synthesis of alpha,alpha'-(EE)-bis(benzylidene)-cycloalkanones was achieved by the reaction of cycloalkanones with different aromatic aldehydes using ethanolic KOH in good yields. Few of the selected compounds were reduced with NaBH4 to the respective alpha,alpha'-(EE)-bis(benzylidene)-cycloalkanols. All these compounds and our earlier synthesized cyclohexyl phenyl methanols were evaluated for their antitubercular, antifungal and antibacterial activities. Several compounds displayed moderate antitubercular activity with MIC = 12.5-1.56 mu g/mL. However, none of the compounds displayed any significant antifungal activity. (c) 2008 Elsevier Masson SAS. All rights reserved.
New spiro (thio) barbiturates based on cyclohexanone and bicyclo [3.1.1]heptan-6-one by nonconcerted [1+5] cycloaddition reaction and their conformational structures
作者:N. N. Pesyan、S. Noori、S. Poorhassan、E. Şahin
DOI:10.4314/bcse.v28i3.12
日期:——
Crossed-aldol condensation reaction of aromaticaldehydes with ketones such as; acetone and cyclohexanone leads to the efficient formation of cross conjugated α,β-unsaturated ketones in excellent yield. The intermolecular and then intramolecular Michael addition reaction of α,β-unsaturated ketones derived from acetone and cyclohexanone with (thio)barbituric acids lead to synthesis new type of 7,11-diaryl-2
芳族醛与酮的交联醇醛缩合反应,如:丙酮和环己酮可有效地形成交叉共轭的α,β-不饱和酮,且产率极高。丙酮和环己酮衍生的α,β-不饱和酮与(硫代)巴比妥酸的分子内和分子内迈克尔加成反应导致合成新型的7,11-二芳基-2,4-二氮杂螺[5.5]十一烷-1, 3,5,9-丁酮和2,4-二芳基-1'H-螺[双环[3.3.1]壬烷-3,5'-嘧啶] -2',4',6',9(3'H )-四酮,分别具有良好的收率。通过1 H NMR,13 C NMR,FT-IR,UV-Visible,质谱和X射线晶体学技术进行结构阐明。讨论了一种可能的形成机理。结构构象还由邻近质子和双子质子之间的二面角衍生的耦合常数证明。来自巴比妥酸的螺环化合物的NH质子的1 H NMR光谱显示宽的单峰,而源自硫代巴比妥酸的螺环化合物中的这些质子显示两个不同的峰。关键词:交叉羟醛缩合,迈克尔加成,[1 + 5]环加成,巴比妥酸,构象,螺环巴比妥酸盐。化学
Inhibitor of CBP Histone Acetyltransferase Downregulates p53 Activation and Facilitates Methylation at Lysine 27 on Histone H3
small molecules with potential to downregulate the activation of p53 could minimize pathology emerging from anticancer therapies. Acetylation of p53 by the histoneacetyltransferase (HAT) domain is the hallmark of coactivator CREB-binding protein (CBP) epigenetic function. During genotoxic stress, CBP HAT-mediated acetylation is essential for the activation of p53 to transcriptionally govern target genes
Symmetrical and unsymmetrical substituted 2,5-diarylidene cyclohexanones as anti-parasitic compounds
作者:Zia Ud Din、Marilia Almeida Trapp、Lívia Soman de Medeiros、Danielle Lazarin-Bidóia、Francielle Pelegrin Garcia、Francieli Peron、Celso Vataru Nakamura、Ihosvany Camps Rodríguez、Abdul Wadood、Edson Rodrigues-Filho
DOI:10.1016/j.ejmech.2018.06.031
日期:2018.7
epimastigoteand trypomastigoteof Trypanosoma cruzi. Eighteen compounds displayed anti-leishmanial activity against promastigotes of L. amazonensis with IC50 values ranging from 2.8 to 10 μM. In addition, two compounds exhibited significant antitrypanosomal activity against epimastigotes of T. cruzi with IC50 values of 5.2 ± 0.8 and 3.0 ± 0.0 μM, while five compounds exhibited activity from 15.0 ± 1.4 to 30.2 ± 1
Solvent-Free Crossed Aldol Condensation of Cyclic Ketones with Aromatic Aldehydes Assisted by Microwave Irradiation
作者:Abbas A. Esmaeili、Mehri Salimi Tabas、Mohammad A. Nasseri、Foad Kazemi
DOI:10.1007/s00706-004-0256-9
日期:2005.4
A fast alumina-promoted crossed aldol-condensation reaction of aldehydes and cyclic ketones under microwave irradiation is described. This process is simple, efficient, and environmentally benign and proceeds in fairly high yield without any self-condensation.
spirocycles in a good yields. All synthesized di-spirooxindole analogs, engrafted with oxindole and cyclohexanone moieties, were evaluated for their anticancer activity against four cancer cell lines, including prostate PC3, cervical HeLa, and breast (MCF-7, and MDA-MB231) cancer cell lines. The cytotoxicity of these di-spirooxindole analogs was also examined against human fibroblast BJ cell lines, and