Cytotoxicity of lapachol, β-lapachone and related synthetic 1,4-naphthoquinones against oesophageal cancer cells
摘要:
Naphthoquinones have been found to have a wide range of biological activities, including cytotoxicity to cancer cells. The secondary metabolites lapachol, alpha- and beta-lapachone and a series of 25 related synthetic 1,4-naphthoquinones were screened against the oesophageal cancer cell line (WHCO1). Most of the compounds exhibited enhanced cytotoxicity (IC50 1.6-11.7 mu M) compared to the current drug of choice cisplatin (IC50 = 16.5 mu M). This study also established that the two new synthetic halogenated compounds 12a and 16a (IC50 = 3.0 and 7.3 mu M) and the previously reported compound 11a (IC50 = 3.9 mu M), were non-toxic to NIH3T3 normal fibroblast cells. Cell death of oesophageal cancer cells by processes involving PARP cleavage caused by 11a was shown to be associated with elevated c-Jun levels, suggesting a role for this pathway in the mechanism of action of this cohort of naphthoquinone compounds. (C) 2013 Elsevier Masson SAS. All rights reserved.
Oxidative free radical reactions between 2-benzyl-1,4-naphthoquinones and β-dicarbonyl compounds
作者:An-I Tsai、Yi-Lung Wu、Che-Ping Chuang
DOI:10.1016/s0040-4020(01)00754-2
日期:2001.9
Oxidative free radical reactionsbetween 2-benzyl-1,4-naphthoquinones and β-dicarbonyl compounds are described. Electrophilic carbon-centered radicals produced by the manganese(III) acetate or cerium(IV) ammonium nitrate oxidation of β-dicarbonyl compounds undergo efficient addition to a C–C double bond of quinone ring. This free radical reaction provides a novel method for the synthesis of naphthacene-5
Synthesis and Cytotoxicity of Analogues of the Marine Secondary Metabolite, 2-Deoxylapachol
作者:Suthananda N. Sunassee、Albert W.W. van Wyk、Omolaja Osoniyi、Denver T. Hendricks、Michael T. Davies-Coleman
DOI:10.3184/030823407x270437
日期:2007.12
The syntheses of four 2-substituted 1,4 naphthoquinones, related to the marine natural product 2-deoxylapachol, are reported. All four synthetic compounds were cytotoxic to WHCO1 oesophageal cancer cells.
2-Substituted 1,4-Naphthoquinones in [6 + 4]-Cycloaddition with 8,8-Dicyanoheptafulvene
作者:Marta Romaniszyn、Katarzyna Gronowska、Łukasz Albrecht
DOI:10.1021/acs.joc.9b01091
日期:2019.8.16
unoccupied molecular orbital reactivity of 2-substituted 1,4-naphthoquinones is possible to be reversed by deprotonation and application of the resulting dienolate as a 4π component in the higher-order [6 + 4]-cycloaddition proceeding in a completely pericyclic manner. 8,8-Dicyanoheptafulvene was shown to be an efficient 6π component in the developed reaction opening the access to functionalized cycloadducts