title: Imidazolinium and amidinium salts as Lewis acid organocatalysts.
abstract: The application of imidazolinium and amidinium salts as soft Lewis acid organocatalysts is described. These salts were suitable catalysts for the activation of unsaturated thioesters in a Diels-Alder reaction and in the ring opening of thiiranes and epoxides. The products were isolated in good yields. The mild catalysts did not cause desulfurization of the products containing a thiol or thiocarbonyl group.
authors.affiliation: Institute of Organic Chemistry, Clausthal University of Technology, 38678 Clausthal-Zellerfeld, Germany.
authors.forename: Oksana
authors.initials: O
authors.lastname: Sereda
authors.forename: Nicole
authors.initials: N
authors.lastname: Clemens
authors.forename: Tatjana
authors.initials: T
authors.lastname: Heckel
authors.forename: René
authors.initials: R
authors.lastname: Wilhelm