Synthesis, anticancer evaluation and molecular docking studies of new heterocycles linked to sulfonamide moiety as novel human topoisomerase types I and II poisons
作者:Ahmed H. Halawa、Walid E. Elgammal、Saber M. Hassan、Ahmed H. Hassan、Hesham S. Nassar、Hassan Y. Ebrahim、Ahmed B.M. Mehany、Ahmed M. El-Agrody
DOI:10.1016/j.bioorg.2020.103725
日期:2020.5
respectively. Moreover, the molecular dockingstudies supported the results from enzymatic assays, where compound 24 was intercalated between nucleotides flanking the DNA cleavage site via pi-pi stacking and hydrophobic interactions. In conclusion, aromatic heterocycles linked to sulfonamides are excellent molecular frameworks amenable for optimization as dual TOP I and II poisons to control various human
The 1,3-dipolar cycloaddition of N-aryl-C-ethoxycarbonylnitrile imines to pyridazin-3-thione afforded novel spirothiadiazolopyridazines in moderate to good yields. The reaction occurs regioselectively at the exocyclic C=S bond. Some of the newly synthesized compounds were tested for their in vitro antitumor activity against three human and murine cell lines [human: A2780, (ovary, carcinoma), A549 (lung, carcinoma); murine: P388 (leukaemia)]. Among the series, some compounds exhibited significant growth inhibitory effects against cell lines P388.
A Suitable Functionalization of Nitroindazoles with Triazolyl and Pyrazolyl Moieties via Cycloaddition Reactions
作者:Mohammed Eddahmi、Nuno M. M. Moura、Latifa Bouissane、Ouafa Amiri、M. Amparo F. Faustino、José A. S. Cavaleiro、Ricardo F. Mendes、Filipe A. A. Paz、Maria G. P. M. S. Neves、El Mostapha Rakib
DOI:10.3390/molecules25010126
日期:——
The alkylation of a series of nitroindazole derivatives with 1,2-dibromoethane afforded the corresponding N-(2-bromoethyl)- and N-vinyl-nitro-1H-indazoles. The Cu(I)-catalysed azide- alkyne 1,3-dipolar cycloaddition was selected to substitute the nitroindazole core with 1,4-disubstituted triazole units after converting one of the N-(2-bromoethyl)nitroindazoles into the corresponding azide. The reactivity
Formation of pyrazol-1,3,4-thiadiazoles through 1,3-dipolar cycloadditions of 3-thioxo-[1,2,4]-triazepin-5-one with nitrilimines: an experimental and computational study
作者:M. Esseffar、M. El Messaoudi、S. Azzouzi、R. Jalal、J. A. Sáez、L. R. Domingo、J. Latorre、M. Liu-González
DOI:10.1002/poc.1421
日期:2009.1
rationalize the formation of the two new bicyclic compounds. Two reaction types are involved in the formation of the compounds 4a–f and 5a–f. The first one is a 1,3‐dipolar cycloaddition (13DC) reaction between 1 acting as dipolarophile and 2a–f as dipoles. The results indicate that the cycloaddition between 1 and 2g, as model of 2a–c, takes place via a high asynchronous bond‐formation process. The regioselectivity
Synthesis of novel spiro-pyrazole and spiro-isoxazoline derivatives of 9α- and 9β-hydroxyparthenolide
作者:Fatima Outahar、Mohamed Moumou、Abdellah Hannioui、El Mostapha Rakib、Lahcen El Ammari、Mohamed Saadi、Mohamed Akssira
DOI:10.1016/j.tetlet.2020.152409
日期:2020.10
A series of novel spiropyrazoles and spiroisoxazolines was efficiently synthesized. Structural modifications were performed at the C-9 and C-13 positions of 9α- and 9β-hydroxyparthenolide, which were isolated from the aerial parts of Anvillea radiata. The structures and stereochemistry of the cycloadducts were fully established by spectroscopic methods including X-ray diffraction data.