title: Synthesis of pyrrolidine-fused 1,3-dithiolane oligomers by the cycloaddition of polycyclic dithiolethiones to maleimides and evaluation as mercury(II) indicators.
abstract: The scandium triflate-catalyzed cycloaddition reaction of polycyclic 1,2-dithiolethiones to maleimides is described. The reaction constitutes an easy approach to linear as well as branched oligomeric cis-fused dihydro[1,3]dithiolo[4,5-c]pyrrole-4,6-dione rings interconnected by 3,5-diylidenethiomorpholine-2,6-dithione or ylidene-6-thioxo[1,2]dithiolo[3,4-b][1,4]thiazin-3-one groups. The presence of highly colored, highly polarized push-pull α,β-unsaturated thione groups in their structures make these compounds sensitive to the presence of mercury(II) cation in organic or mixed organic/aqueous solvents.
authors: Department of Chemistry, Faculty of Sciences, University of Burgos , 09001 Burgos, Spain.
authors: Pedro
authors: P
authors: Fuertes
authors: María
authors: M
authors: García-Valverde
authors: José V
authors: JV
authors: Cuevas
authors: Borja
authors: B
authors: Díaz de Greñu
authors: Teresa
authors: T
authors: Rodríguez
authors: Josefa
authors: J
authors: Rojo
authors: Tomás
authors: T
authors: Torroba