JOURNAL OF ORGANOMETALLIC CHEMISTRY, vol.759, pp.67-73, 2014 (SCI-Expanded)
Article / Article
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Science Citation Index Expanded (SCI-EXPANDED), Scopus, Index Chemicus (IC), Current Chemical Reactions (CCR)
1,2,4-Oxadiazole, Amidoxime, Ferrocene, 3-Ferrocenylpropynal, Conjugate addition, Cyclization, SOLVENT-FREE CONDITIONS, RADICAL-STABILIZING ABILITY, TYROSINE KINASE ZAP-70, ACTIVITY IN-VITRO, MICROWAVE IRRADIATION, ANTIMALARIAL ACTIVITY, PARALLEL SYNTHESIS, 1,3-DIPOLAR CYCLOADDITION, BIOLOGICAL EVALUATION, EFFICIENT SYNTHESIS
Eskisehir Osmangazi University Affiliated:
One-pot synthesis of 5-ferrocenyl-1,2,4-oxadiazoles via the reaction between 3-ferrocenylpropynal and amidoximes is described. 3-Ferrocenylpropynal reacts with a variety of amidoximes in the presence of KOH in refluxing dioxane to afford a broad range of 5-ferrocenyl-1,2,4-oxadiazole derivatives. The reaction first produces the corresponding conjugate addition product which, upon cyclization and rearrangement, yields the targeted 1,2,4-oxadiazole. The reaction appears to be general for a diversity of amidoximes and tolerates the presence of aryl groups with electron-withdrawing and electron-donating substituents. (C) 2014 Elsevier B.V. All rights reserved.