title: Silicon-(thio)urea Lewis acid catalysis.
abstract: We present a new class of catalysts based on the combination of N,N'-diaryl(thio)ureas and weak silicon Lewis acids (e.g., SiCl(4)). Such silicon-(thio)urea catalysts effectively catalyze the stereospecific rearrangement of epoxides to quaternary carbaldehydes.
authors.affiliation: Institute of Organic Chemistry, Justus-Liebig University, Heinrich-Buff-Ring 58, 35392 Giessen, Germany.
authors.forename: Radim
authors.initials: R
authors.lastname: Hrdina
authors.forename: Christian E
authors.initials: CE
authors.lastname: Müller
authors.forename: Raffael C
authors.initials: RC
authors.lastname: Wende
authors.forename: Katharina M
authors.initials: KM
authors.lastname: Lippert
authors.forename: Mario
authors.initials: M
authors.lastname: Benassi
authors.forename: Bernhard
authors.initials: B
authors.lastname: Spengler
authors.forename: Peter R
authors.initials: PR
authors.lastname: Schreiner