Synthesis and Antimicrobial Activity of Some New Pyridazine Derivatives
作者:Ionel I. Mangalagiu、Maria D. Caprosu、Roxana M. Butnariu、Ionel I. Mangalagiu
DOI:10.3987/com-05-10428
日期:——
Five new pyridazinederivatives (1 salt and 4 pyrrolopyridazine cycloadducts) were prepared and tested in vitro as antimicrobial compounds. Some of them have proved to have a remarkable activity against different micro organisms (germs and fungi). The influence of microwave irradiation concerning cycloaddition reactions of pyridazinium ylides was studied. Stereo- and regiochemistry involved in these
New pyridazine derivatives: Synthesis, chemistry and biological activity
作者:Roxana M. Butnariu、Ionel I. Mangalagiu
DOI:10.1016/j.bmc.2009.02.028
日期:2009.4
concerning synthesis, structure and biological activity of some new pyridazinederivatives. Syntheses have been done both under classical conditions and microwave [in liquid phase and interphasic transfer catalysis (PTC)]. The MW induced a remarkable acceleration for the [3+2] dipolar cycloaddition reaction of pyridazinium ylides to activated alkenes and alkynes, the yields were increased in some cases
Pyrrolodiazine derivatives as blue organic luminophores: synthesis and properties. Part 3
作者:Gheorghita N. Zbancioc、Thomas Huhn、Ulrich Groth、Calin Deleanu、Ionel I. Mangalagiu
DOI:10.1016/j.tet.2010.04.050
日期:2010.6
irradiation, in liquid phase, is reported. Under MW irradiation the yields are much higher, sometimes substantially (by almost double) and, the amount of solvent used is at least 5-fold less. The pyrrolopyridazine (PP) derivatives are very intense blue emitters and have high quantum yields (up to 90%) while pyrrolophthalazine (PHP) compounds are still intense blue emitters but the quantum yield is negligible
An efficient and selective route to hybrid trifluoromethyl-substituted γ-lactones or fused nitrogen derivatives via cascade reactions
作者:Roxana Tucaliuc、Valeriu V. Cotea、Costel Moldoveanu、Gheorghita Zbancioc、Calin Deleanu、Peter G. Jones、Ionel I. Mangalagiu
DOI:10.1016/j.tetlet.2011.09.093
日期:2011.11
A straightforward, efficient and selective route for obtaining hybrid trifluoromethyl-substituted γ-lactones and fused nitrogen heterocycles is presented. The reaction could be guided either to γ-lactones with a nitrogen-containing heterocyclic skeleton (for monocyclic systems) or to fused nitrogen heterocycles (for fused bicyclic systems). A new class of γ-lactone with a nitrogen heterocyclic skeleton